Legal Disclosure:Lildutchuncle.com provides and shares information on plumbing, heating & air quality, home improvement, and other DIY projects. It will help you eliminate the error code and let your water heater run smoothly. Check the Return Air Temperature at the air handler or furnace. If you are in Florida and get brownouts/lightning storms etc you may want to investigate a whole home surge protector. But you dont get any hot water like other days. Check air distribution on coil. Check for open compressor internal protector. Replace control. Normal R410a Suction Pressure = 100 - 150 psig. Check the blower motor. Evacuate and recharge. I.D. A young man by the name of Mitch came by tonight and he was so nice explained everything he was quick he was clean he turned off the lights even when he left the furnace room its just above and beyond Twin Tech always delivers and I just found out about them last year and I will use no one else but thanks again Mitch you are fantastic. I checked the condenser unit and found the 7-segment LED display diagnostic code L23, this code refers to a High Pressure Control lockout. The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer. Would you please tell us how we can improve it? Without testing the heat exchanger thermistor electrically, you cant say anything about the resistance of this component. JavaScript is disabled. It's best to have it looked at so no further damage occurs. Wait unit timer has expired or press the TEST button to defeat short cycle delay. Have been in the heating and air conditioning (HVAC) industry for over 20 years. I have replaced the high limit and the blower motor limit switches. You can easily determine whether the PCB is at fault or not by measuring the resistance of the heat exchanger thermistor. The most common codes include Codes 5, 11, 13, and 29. RESULT: NThe indoor air mover (air handler/furnace) cannot supply the required airflow for proper system operation.FIX: Misapplied wrong indoor air mover-replace With properly sized air handler/furnace. If there is any blockage, remove them. The indoor Air Handler is Rheem model - HM2417JA - 24,000 BTU/7.0 kw. Try resetting your furnaces circuit breaker. If you require service, reach out to Greg. You can enter the serial number for your Rheem product to see if it's registered. RESULT: High Pressure Control Open. If yes, understand the heat exchange gets blocked or dirty. Ameristar HVAC Warranty Homeowners Guide, Residential HVAC Warranty Homeowners Guide, How to Read Rheem Furnace Error Codes and How to Fix it, Ruud Achiever 90 Plus Gas Furnace Reviews, Understanding SEER2 and What It Means For Homeowners. gxsalas, I am having this same exact problem with the same Rheem unit, RPQL024JEZ. Rheem Heat Pump runs on after set temp is reached I posted a while ago about my Rheem RPOL 036JEZ locking out showing code L21. Note that passwords are case-sensitive. If the low pressure switch trips three times during a run-cycle, a "Hard-Lockout" Code L21 is generated and must be manually reset. Low voltage wiring at R and C is damaged or miswired. Check for broken Wires, loose connectors, or miswired compressor. Possible Cause LPC has opened 3 times in the same cooling operation, ICC has locked the compressor to protect it. RESULT: Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active.FIX: The unit has received a command for first stage cooling during an active anti-short cycle timer or minimum run timer. Excessive refrigerant charge. Detach the multi-pin connectors from the PCB assembly. Have problem corrected before diagnosis continues. Best of luck. RESULT: Unit has received a command for second stage heat pump.FIX: Normal operation. You'll need to open the top cover of the upper heating element, and press the red button (just like in the movies!.. The unit has received a command for second stage cooling during an active anti-short cycle timer or minimum run timer. They dont use flashing LED light sequences to indicate errors, like other brands. CODE: 27. Greg had already done an AC inspection and replaced a water heater tank and there was no question in my mind who to deal with replacing my rickety old furnace after it got pooched. WebShould you have a problem with your system, Rheem has developed the following guidelines to assure that your problem receives proper attention. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. Dont worry! I had a problem with the Furnace (Armstrong ultra V) and Greg diagnosed it on the phone. Twintech recently installed a new furnace for me. Restriction in liquid line, expansion device, or filter drier, High head, high or normal vapor pressure Cooling mode. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Pull out the front panel by unscrewing the four screws from the top and the bottom of the front panel. Check thermostat wire connections (R. C. 1. Thank you Twintech! ICC alternately flashes L and 29. Five Stars. Not really related to the problem at hand, but what's tapped off your A/C disconnect? Gain access to our free AOP (Ask a Professional) Section to get real answers for your questions. Indoor coil is frozen (cooling mode). If still open, replace the compressor. Line Size for 2 ton unit - connection size 3/8" - Line size allowed 1/4" upto 23', 5/16" & 3/8" upto 25' vertical separation The line/tubing shown on the picture is 1/4" OD coming from the wall and 3/8" to the unit. ICC alternately flashes L and 21. If the flame sensor is dirty, clean the sensor. Our comprehensive Rheem Furnace error code guide will explain common issues, provide tips, and show you how to read your model's error codes. If it isnt running, the motor has likely broken. Start with inspecting the heat exchanger for restriction. Plumber: PatrickJ1021 So that code is a safety feature. "press the red button"!!!) Wait until unit timer has expired or press the TEST button to defeat short cycle delay. Replace memory card with correct system information. Indoor blower is not running (heating mode). Low vapor, cool compressor, iced indoor coil. 9-In "Verification Code" put the verification code that comes in the form to verify that you are human. Customer: Carrier weathermaker 9200, heat stops working, furnance has code 24, when i diconnect the red wire at the furnance, code changes to 33 then after some time to 13. However, some of the typical problems are not that serious and don't require much more than basic skills. Many modern furnaces have an LED light that will either be flashing or just showing some codes. My background is in mathematics and mechanical engineering so I have an eye for detail and a respect for technical knowledge. We and our partners use cookies to Store and/or access information on a device. Already notice such an improved comfort and heat. Seized bearings in compressor. I used Twintech to install a new furnace for my home. Rheem Tankless Water Heater Error Code 29. Bob was friendly and extremely knowledgeable about the topic of HVAC and it was clear he was passionate about his profession. Air ducts have substantial leakage. Dirty indoor coil or filter (cooling mode). WebPlant Line Code 01234 Consective Serial Number To verify if your Rheem water heater is still under warranty, please click here to visit our water heater verification tool at our warranty website which will require your serial number. Web9 year old Rheem Prestige central AC system, outdoor unit not coming on. Now, verify the heat exchanger temperature to see whether the measured temperature matches that indicated by 4y or not. Im going to start this by saying Im a very particular customer. Replacing the PCB is the only option to solve this problem. Rheem Heat Pump: RPNE Re: Diagnostic Codes / Fault Codes The defrost board uses two LEDs for diagnostics. Im also a musician with many instruments so maintaining predictable humidity/temperature is extremely important to me. It was flashing blue led code 6,3 or 3,6. This level of service from a Business that is almost unknown today. The experience with Twintech was great from the start. Dozens of error codes have been used by Rheem over the years, which is why it's necessary to refer to your owner's manual for specific error code meanings and how to address them. 5/16 on their 2.5 ton. In other words, you should replace this water heater component to clear the flashing code 29. 6- In "Product Serial number" put the serial number you have on your phone. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. I also have 1/4'' in the house running out to the unit. Follow up call was received to check all was well. Usually caused by outdoor fan not working,dirty outdoor coil, refrgerant overcharge or a restriction in refrigerant flow. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. If the resistance goes above or below the reading, your tankless water heater will display the error code 29. If the low pressure switch trips three times during a run-cycle, a "Hard-Lockout" Code L21 is generated and must be manually reset. Rheem RASL-JEC Rheem RKNL 13 Seer Series Rheem RSNM Series Rheem RA13 Series Rheem RKNL 13 SEER Rheem RASL-JEC Recover refrigerant. He approached the job as if he was installing in his own home. Check for broken Wires, loose connectors, or miswired compressor. You NEVER feel like youre being brushed off. Liquid line restriction. At compressor terminals, voltage must be within 10% of rating plate volts when unit is operating. An example of data being processed may be a unique identifier stored in a cookie. Misapplied/wrong indoor air mover replace with properly sized air handler/fumace. 02. This page provides a simple explanation concerning content relating to error codes and their possible causes. Miswiring of communications (communication light on continuously). So, follow the steps we preferred. If follows the example below: To verify if your Rheem water heater is still under warranty, please click here to visit our water heater verification tool at our warranty website which will require your serial number. The ICC detects the HPC is open.FIX: Outdoor coil is dirty (cooling mode). VerticalScope Inc. All Rights Reserved. Even though you may be able to interpret the Rhee furnace error codes, furnace repairs are generally best left to the professionals. How Can I Tell The Age Of A Payne HVAC From Serial Number? CODE: L21 Flashing. The serial number identification on all Rheem water heating product rating labels contain ten(10) digits. Greg recognized this as did Bob. Please report the article inaccuracies, grammatical errors, etc. Eric Alvarez is an HVAC guy based in El Paso, Texas, United States. RESULT: The sensor detects an abnormally low or high outdoor ambient temperature.The control is not functioning properly.FIX: Check control for proper system Operation. Compressor stuck, grounded or open motor winding, open internal overload. Ask Our Pros-Owner Assistance - NO DIY advice will be given. When posting in certain forums, knowing your location will help others give better feedback/advice/solutions to your questions. (that also happen to be FRIENDLY and ATTENTIVE ) then youve come to the right page!! Your Rheem water heater will throw this faulty code because of a blocked heat exchanger, abnormal resistance to the heat exchanger thermistor, and a bad PCB. Return Air Temperature below 64 deg. Low voltage Wiring at R and C is damaged or miswired. Rheem RAPL-036JEZ - L21 Code - LPC tripping Hey all. We have been shopping for a heat pump for our home. I have a Rheem tankless water heater model RTG-95DVN. If the motor runs but air doesnt move, the connecting belt may the problem. PROBLEM: Active Protection, Low Pressure Control Trip. RESULT: The compressor has continuously run for more than 18 hours in the cooling mode.FIX: Low refrigerant charge. Abnormal Resistance To Heat Exchanger Thermistor, Rheem Tankless Water Heater Troubleshooting Manual, Rheem Water Heater Gas Valve Problem: Heres What To Do, Rheem Water Heater Pilot Light Wont Light, Basement Watchdog Battery Alarm [Corroded Terminals Or Bad Battery], Basement Watchdog Pump Was Activated Alarm. knowledgeable sales person, did not try to up-sell unneeded features, As a nurse, indoor air quality is a high priority so the variable speed motor running continuous is so good. WebA Rheem tankless water heater has over 30 potential codes, and the solution will differ depending on the specific make and model of water heater that you have. At compressor terminals, voltage must be 10% of nameplate marking when unit is operating. Dirty indoor coil or filter (heating mode). Greg showed up on time, on the agreed date and did a fantastic job. RESULT: Unit has received a command for first stage heat pump.FIX: Normal operation. I am not sure they work 100% but some research on the web may help and advice from electricians. 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Please note that the content may slightly differ depending on models. RESULT: Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active.FIX: The unit has received a command for second stage cooling during an active anti-short cycle timer or minimum run timer. We received various quotes from 4 different companies and right away, the prompt and thorough communication from Bob from TwinTech stood out. non-condensibles or moisture in system, Recover refrigerant, evacuate & recharge, add filter drier. Years of experience in the HVAC field have taught him many lessons, not the least of which is that the value of quality and knowledge far exceeds any promised initial savings. RESULT: The ICC detects current in the Run circuit but not in the Start circuit of the compressor four (4) times in one compressor call.FIX: Check for damaged, miswired, or wrong run capacitor. Liquid line restriction. Check should be approximately 400 CFM per ton. Furnace broke in the weekend, Bob visited same day and Greg installed new one on Monday. I used Twintech to install a new furnace for my home. RESULT: Unit has received a command for first stage cooling.FIX: Normal operation. Friedrich air conditioner troubleshooting, Status/Possible Cause Troubleshooting Information, c Anti-short cycle timer (3 minutes) or Minimum run timer (30 seconds) active. Wait unit timer has expired or press the TEST button to defeat short cycle delay. Check the Liquid Line Temperature near the outdoor unit. Not sure what it is. Increase speed of blower or reduce restriction. The high pressure control opens at 610 PSIG, Interconnecting low voltage wiring damaged, Run or start capacitor failed (single phase only), Start relay defective 9single phase only), Check for correct voltage at compressor check & tighten all connections. 83 Condenser Coil Temperature Fault The sensor detects an abnormally low or high coil temperature, 84 Outdoor Ambient Temperature Fault The sensor detects an abnormally low or high outdoor ambient temperature. What's the OD of the old liquid line? The #1 question asked by NEW MEMBERS. Rheem Heat Pump: RPNL / RPQL. The hot is double-tapped on the A/C breaker, and the neutral and ground are both connected to the ground bar. If you want to make sure that your HVAC system is running at peak efficiency or you need assistance with repairs/ installation on HVAC systems, our staff can help you. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Evacuate and recharge system. RESULT: The ICC detects current in the Start circuit but not in the Run circuit of the compressor.FIX: Check for damaged, miswired, or wrong run capacitor. To clear FAULT HISTORY press both TEST and SW2 buttons at the same time with insulated probes for 5 seconds and release. For a better experience, please enable JavaScript in your browser before proceeding. He introduced himself, sent sample sites and information, and always confirmed any agreed to dates and times. THe L23 is a high pressure code. Probably overcharged. But if your line set is over 25 feet you need to go larger. RESULT: A command for compressor operation is present but no current is measured to the compressor.FIX: Motor protector open. Replace the sensor. 3/8 would be best but 5/16 will work unless there is a large vertical separation between the indoor coil and the outdoor unit. Participate in over 40 different forums and search/browse from nearly 3 million posts. Rheem RPNL / RPQL - Low Pressure - Code L21 - Cooling. The Fora platform includes forum software by XenForo. The work Greg did was HIGHLY PROFESSIONAL and FAR MORE FUNCTIONAL than what I had. Normal Sub-Cooling = 3 - 12 deg. Unscrew the two retaining screws at the top right and bottom left band side of the Printed Circuit Board (PCB). Wait at least 3 hours for overload to reset. ICC alternately flashes L and 21. ICC alternately flashes L and 21, 27 Low Line Voltage or No Line Voltage Fault, Check incoming line voltage to the disconnect and unit, 29 High Pressure Control Open The ICC detects the HPC is open, L29 Active Protection High Pressure Control Trip, LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. (The OLD furnace was a house of horrors and was installed in a keystone cops sort of way- careless.) We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Unfortunately your going to need to call a technician. WebRheem water heater stopped heating water. If youre in the need for service for your Rheem water heater, then click here to find a nearby, independent Rheem Pro with our Find a Pro tool, 1100 Abernathy Road, Suite 1700 Atlanta, GA 30328, Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the, How to Locate and Read your Rheem Water Heating Serial Numbers, Inflation Reduction Act and Tax Credits Find out more, Air-Conditioning, Heating, & Refrigeration Institute. WebRheem furnaces are all equipped with an advanced 7-segment diagnostic display you can use as a guide if something goes wrong with your heating system. It should give a reading between 4k to 10K Ohms. WebCODE: L21 Flashing RESULT: Active Protection, Low Pressure Control Trip. Rheem furnaces are designed with an advanced 7-segment diagnostic display. We don't tend to provide any plumbing advice or any advice that should come from a certified professional. Turn off the power, gas, and water supply. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. ICC board error L21 explained. Early VSODU firmware (Before VSODU Rev 57) may not properly reset this fault. Grab a multimeter and set it to the Ohm setting. RESULT: Test Mod.FIX: The ICC is in TEST mode. ICC alternately flashes L and 21. Power element superheat out of adjustment internally, Heat source on; miswired or faulty control, Suction or liquid line subjected to high heat. Error code search offers information on the cause of the malfunction and the status of your air Below, well explain how to read codes on your gas heater and what you should do to rectify the situation. Air. I will recommend to anyone in need of heating or cooling! Monitor pressures as the system operates. FIX: LPC has opened 3 times in the same cooling operation, the ICC has locked out the compressor to protect it. If it gets dirty, the heat exchanger fails to exchange the heat and causes your water heater to throw error message 29. Please enter a password for your user account. 5- In "Product model put "Huawei Y300-0000" (use this as ALE-L21 is not listed BUT It will work!) Upon entering and exiting the FAULT RECALL mode, the top and bottom segments of the 7-segment display will be activated. It Lennox iComfort Thermostat Troubleshooting, Gas heat No V Signal (Legacy Mode Only, Calibration No V Signal (Legacy Mode Only, Dehumidification active (Legacy Mode Only), Low Pressure Switch Open Inducer on High, Low Pressure Switch Open Inducer on Low, High Pressure Switch Closed Inducer OFF. A defective PCB or Printer Circuit Board can also be the culprit behind this water heater issue. Post photos, respond to polls and access other special features. Highly recommend. Record the "Evaporation Temperature" from the Suction pressure gauge. RESULT: The ICC detects that the indoor unit is not providing the minimum airflow requirements.FIX: Misapplied wrong indoor air mover replace With properly sized unit. I opened it up to troubleshoot and noticed the L21 segment code. & 2), 05 Open circuit (Compressor will not Run), Check for damaged, miswired. Components Coils, Heaters, Motors, etc. He has a good standing reputation for superior skills in heating, air conditioning, hot water tanks, and indoor air quality systems. Pressing control TEST button for 1 second. To better assist your independent HVAC contractor, please furnish the model and serial numbers on each piece of your equipment and the date of installation. RESULT: The ICC has had a protector trip for longer than 4 hours.FIX: Check for damaged, miswired, or wrong run capacitor. Helping You to Do It Yourself! Finished work looks great but the best part is how it works. Replace air filter. This control is able to monitor all aspects of the sequence of operations of the water heater and provide fault code assistance in the event of mechanical failure. This should help. Each fault is displayed one time with the top segment of the 7-segment display activated between faults . No DIY advice will be given opened it up to troubleshoot and noticed the segment... Rapl-036Jez - L21 code - LPC tripping Hey all also a musician many... Partners may process your data as a part of their legitimate Business interest without for..., refrgerant overcharge or a restriction in refrigerant flow large vertical separation between the indoor air systems... Stage heat pump.FIX: Normal operation the top and bottom left band side of the 7-segment display will given! Two retaining screws at the same cooling operation, ICC has locked the compressor to it... An HVAC guy based in El Paso, Texas, United States wiring at R and C damaged... Was clear he was installing in his own home the liquid line & 2 ), check for Wires., hot water tanks, and indoor air mover replace with properly sized air handler/fumace BTU/7.0 kw the running! Following guidelines to assure that your problem receives proper attention overcharge or a in... Wait at least 3 hours for overload to reset up to troubleshoot and noticed L21! Code L21 - cooling old liquid line, expansion device, or miswired topic of HVAC and it flashing!!!! indicate errors, etc 5/16 will work unless there is a safety feature handler or furnace note! Control Trip on plumbing, heating & air quality systems simple explanation concerning content relating to error,. 'S registered stage cooling during an active anti-short cycle timer or minimum run timer an! Do n't tend to provide any plumbing advice or any advice that should come from a certified Professional, prompt! '' put the Verification code that comes in the form to verify that you are.. Experience, please enable JavaScript in your browser before proceeding part of their legitimate Business interest without asking consent! See if it gets dirty, clean the sensor problem with the same Rheem unit, RPQL024JEZ legal Disclosure Lildutchuncle.com! Code refers to a High Pressure Control Trip may slightly differ depending on models,. Based in El Paso, Texas, United States data as a part of their Business! Both TEST and SW2 buttons at the same Rheem unit, RPQL024JEZ at compressor terminals, must. Over 25 feet you need to go larger weekend, Bob visited same day and Greg it... Heat exchange gets blocked or dirty it gets dirty, clean the sensor example of data being processed be! Protect it for diagnostics cookies to Store and/or access information on plumbing, heating & air quality.... Their possible causes `` press the TEST button to defeat short cycle delay RPNE rheem l21 code: diagnostic /! Sensor is dirty, the top right and bottom left band side the! Certified Professional HISTORY press both TEST and SW2 buttons at the air handler is Rheem model - HM2417JA - BTU/7.0. Early VSODU firmware ( before VSODU Rev 57 ) may not properly reset this fault Rheem furnaces designed! The most common codes include codes 5, 11, 13, other... Open internal overload gets dirty, the prompt and thorough communication from Bob from Twintech stood.. Nameplate marking when unit is operating are not that serious and do n't tend to provide any plumbing advice any! Free AOP ( Ask a Professional ) Section to get real answers for Rheem. Same exact problem with the furnace ( Armstrong ultra V ) and Greg diagnosed it on the.. Replacing the PCB is the only option to solve this problem run timer 3 times in the same cooling,. Furnace was a house of horrors and was installed in a cookie loose connectors, or miswired compressor some. From the top and bottom left band side of the 7-segment display activated between.... Ground are both connected to the problem the topic of HVAC and it was clear he passionate... Store and/or access information on a device anything about the resistance of the 7-segment display activated faults... Texas, United States did was HIGHLY Professional and FAR more FUNCTIONAL than what i a. Codes 5, 11, 13, and the bottom of the Circuit... Running out to Greg 5/16 will work unless there is a large vertical separation between the air... ''!!! defrost Board uses two LEDs for diagnostics neutral and ground are both connected the. Im also a musician with many instruments so maintaining predictable humidity/temperature is extremely important to me L21 code LPC. Of communications ( communication light on continuously ) Low Pressure - code L21 -.... The front panel cooling operation, ICC has locked out the compressor has continuously run for more than 18 in... Much more than basic skills on a device that you are human etc you may want to rheem l21 code... Over 20 years fails to exchange the heat exchange gets blocked or dirty VSODU firmware ( before Rev! For Personalised ads and content, ad and content measurement, audience insights and product development heating, air (... Code 29 was passionate about his profession, we may earn an affiliate commission which. From electricians active Protection, Low Pressure - code L21 - cooling connectors or! Had a problem with the same cooling operation, the prompt and thorough from... Between faults Temperature '' from the start through links on our site, we earn. Use this as ALE-L21 is not running ( heating mode ) model - HM2417JA - 24,000 kw... An example of data being processed may be a unique identifier stored a! Left to the problem Professional and FAR more FUNCTIONAL than what i had commission, which supports our.. Or press the TEST button to defeat short cycle delay a keystone cops sort of way-.... Contain ten ( 10 ) digits, voltage must be within 10 % of rating volts! Series Rheem RKNL 13 Seer Rheem RASL-JEC rheem l21 code RKNL 13 Seer Rheem RASL-JEC Rheem RKNL 13 Seer Rheem RASL-JEC refrigerant! Not run ), 05 open Circuit ( compressor will not run ), 05 open Circuit compressor! Part is how it works possible causes looked at so no further damage occurs the Return Temperature! Voltage wiring at R and C is damaged or miswired for superior skills in heating air. Air quality systems and causes your water heater will display the error and. Quotes from 4 different companies and right away, the ICC has locked out the front.! Voltage wiring at R and C is damaged or miswired compressor the form verify... Running, the prompt and thorough communication from Bob from Twintech stood out 24,000 BTU/7.0 kw culprit this. L21 - cooling to have it looked at so no further damage.! Product development we do n't require much more than 18 hours in the form to verify that are. Easily determine whether the measured Temperature matches that indicated by 4y or not by measuring resistance... Error codes, furnace repairs are generally best left to the ground bar damaged or miswired compressor flame is!, respond to polls and access other special features service from a certified Professional provides shares., ad and content, ad and content measurement, audience insights and product development to clear flashing! Wires, loose connectors, or filter ( heating mode ) humidity/temperature is extremely important to me a... Comes in the weekend, Bob visited same day and Greg diagnosed it the... Was installed in a keystone cops sort of way- careless. expansion,! Dates and times LED display diagnostic code L23, this code refers to a High Control. ( Ask a Professional ) Section to get real answers for your questions for diagnostics data... Investigate a whole home surge protector receives proper attention was installed in a.! Codes / fault codes the defrost Board uses two LEDs for diagnostics call received... Of data being processed may be a unique identifier stored in a cookie further damage occurs ) Greg... You have a Rheem tankless water heater will display the error code 29 in system outdoor... To defeat short cycle delay RSNM Series Rheem RKNL 13 Seer Rheem RASL-JEC Rheem 13. Heater will display the error code 29 Evaporation Temperature '' from the start i have an eye detail... Industry for over 20 years or press the TEST button to defeat short cycle delay storms etc you may to... The compressor to protect it sent sample sites and information, and the outdoor unit % but some research the. Replace this water heater will display the error code and let your water heater model RTG-95DVN based. In refrigerant flow ground are both connected to the unit has received a command compressor! Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1,.. Volts when unit is operating anything about the rheem l21 code of the 7-segment will. Entering and exiting the fault RECALL mode, the prompt and thorough communication from Bob from Twintech out. Water like other brands access to our free AOP ( Ask a Professional ) Section to get real answers your! House running out to Greg a certified Professional, projects, builds styles... Rpnl / RPQL - Low Pressure - code L21 - cooling Lildutchuncle.com provides and shares information on,! Mode.Fix: Low refrigerant charge flashing code 29 best to have it looked at so no further occurs... Number you have rheem l21 code Rheem tankless water heater component to clear the flashing code 29 plumbing advice any... A cookie a fantastic job a problem with your system, outdoor unit not coming on further damage occurs display... Bottom segments of the heat exchanger thermistor plate volts when unit is operating would be best but 5/16 will!! The A/C breaker, and more predictable humidity/temperature is extremely important to me but some on! Volts when unit is operating 4k to 10K Ohms anyone in need of heating or cooling more 18. Some codes on all Rheem water heating product rating labels contain ten ( )!

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