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Navien Tankless Error Codes
Navien Tankless Error Codes
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This is the Entire list of Error codes for the Navien tankless water heater.
These troubleshooting tips are for models 180, 210, 240.
If you have any further questions send an email or post in the comments section and we will try to answer all inquiries.
| E001 | Water is boiling in the Heat Exchanger | 1. clean the inlet water straining2. Check the automatic flow
3. Check the heat exchanger, remove and clean with a solution |
| E003 | Ignition Failure | 1. Check to see if the main gas supply is on2. Check that the power is on
3. Check the igniter for spark |
| E004 | False flame detection | 1. Ensure ground wire is connected
2. Check the igniter for spark |
| E007 | Hot water outlet: thermistor -open | 1. Check the thermistor
2. Replace the thermistor |
| E008 | Hot water outlet: thermistor -short | 1. Check the thermistor
2. Replace the thermistor |
| E009 | Abnormal fan motor activity | 1. Check and clean the air filter
2. Check and clean the fan motor |
| E010 | Abnormal Air Pressure | 1. Check the vent pipe for obstructions
2. Check and clean the air filter |
| E012 | Flame loss | 1. Check the main gas line (valve open?)
2. Check intake air pipe 3. Check the ground wire 4. Check power supply |
| E015 | Abnormal control board | 1. Check power supply
2. Check the GFI |
| E016 | Overheating of heat exchanger | 1. Turn off the the for at least 30 minutes ten restart.
2. Clean the inlet water strainer 3. Check the automatic flow adjustment valve 4. Check the heat exchanger: remove and clean with a cleaning solution |
| E021 | Cold water inlet: thermistor 1 -open | 1. Check thermistor
2. Replace thermistor |
| E022 | Cold water inlet: thermistor 1 -short | 1. Check thermistor
2. Replace thermistor |
| E027 | Abnormal activity of the air pressure sensor | 1. Check the vent pipe for obstructions
2. Check and clean the air filter |
| E030 | Exhaust overheat: exhaust high limit switch shuts down the unit when the flue temperature exceeds 149 F or 65C | 1. Turn off the the for at least 30 minutes ten restart.2. Clean the inlet water strainer
3. Check the automatic flow adjustment valve 4. Check the heat exchanger: remove and clean with a cleaning solution |
| E032 | Cold water inlet: thermistor 2 -open | 1. Check thermistor
2. Replace thermistor |
| E033 | Cold water inlet: thermistor 2 -short | 1. Check thermistor
2. Replace thermistor |
| E034 | Abnormal – flow adjustment valve | 1. Check the flow adjustment valve |
| E035 | Abnormal activity of the gas pressure sensor | 1. Check gas line |
| E036 | Communication failure | 1. Contact Navien Tech. support |
| E037 | Water leak inside unit | 1. Close cold water main
2. Replace leaking parts |
| E038 | Abnormal circulation pump | 1. Check the circulation PUMP.
2. Check the water flow sensor 3. Check the cold water main |
| E039 | Abnormal – water flow sensor | 1. Check the water flow sensor |
| E041 | Hot water outlet: thermistor 2 -open | 1. Check thermistor
2. Replace thermistor |
| E042 | Hot water outlet: thermistor 2 -short | 1. Check thermistor
2. Replace thermistor |
| E043 | Abnormal cascade connection | 1. Check model type |
| E044 | Abnormal thermistor connection | 1. Check thermistor connection |
| E045 | Abnormal – mixing valve | 1. Check the mixing valve |
| E048 | Abnormal LPG gas pressure | 1. Check the LPG gas
2. Fill the LPG gas |
There will be error codes on both the remote control and on the computer board on the main unit.
To reset a Navien tankless water heater either unplug the unit and wait a minute to plug it back in again, or press the power button on the remote control off and then back on again.
If Nothing else works call Navien’s Tech Support at 1-800-519-8794
See Also:
| Print article | This entry was posted by administrator on April 25, 2010 at 6:45 pm, and is filed under General Info, INFO, Navien Tankless. Follow any responses to this post through RSS 2.0. You can leave a response or trackback from your own site. |
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about 1 month ago
Hey Jim, did this ever get resolved? I’ve been having the same issue for a year now. At first it was a couple times a week, but now it’s a couple times a day, if not more! I miss my water heater tank. =(
about 1 month ago
Have you tried turning both the bathtub and facet on to full hot?
about 1 month ago
installed a Nr 180 natural gas today dec.16/2011 turn on hot water tap and the unit will not fire .what is going on?Open the relief valve and the unit fires. What is going on?
about 4 months ago
I have been having a problem with my Navien NR-240A. The fault code displayed is 27 which is abnormal activity of the air pressure sensor. I have rebooted the unit several times and the final time I got it working again. I had to kill the breaker to it, and leave it off for a few minutes, then reflash it. Eventually I got it running. This might work for anyone out there with a similar problem.
about 7 months ago
I have had my Navian R-210-A for about 9 Months. I use propane and constantly get the R048 abnormal gas pressure error code. This thing has crapped out at least 20 times since we had it installed. The tech who installed it has come out numerous times and replaced the regulators and taken pressure readings. All is fine but it continues to crap out. I called the Navian tech number and talked to someone who showed little interest in getting to the bottom of this. He just says get the tech out there again and call tech support with the pressure readings. I am sorry I ever purchased this thing. I have propane which is very expensive and thought this would save money. We love it when it’s working and hate it when the water goes cold half way into a shower.
about 8 months ago
I am a plumber with over 20yrs residential experience and if I ever want to be be-littled, talk to like I’m a fool, or get treated like an absolute retard, I give the Navien tech department a call. They are the most condescending bunch of pricks I’ve ever dealt with. We’ve installed in the neighborhood of 20-30 units dating back to oct/08 (cr’s, nr’s, 180′s, 210′s, 240′s, etc), and had a call back rate of 100%. And believe me when I tell you, every manufacturers installation instruction was followed EXACTLY and every installation was in a newly constructed home. I’ve had to replace heat exchangers, grey elbows, gas valves, pressure switches, circ pumps, gas valves, flow switches, flow sensors, complete units, I could go on but I need more space. We even had one where it fired fine with one faucet open, open another faucet and the unit would switch off, but gas would continue to flow. Then it would attempt to light again followed by a serious of mini-explosions (WTF?!!!). I phoned the tech line, and after waiting on the phone (you are the….10th….caller in the que) about 1.5 hrs, they proceed to tell me “you most likely installed it wrong”. Now when a customer inquires about a tankless heater, I do my best to talk them OUT of one and into a high efficient tank-type.
My advice is GET RID OF THE UNIT NOW!! YOUR PROBLEMS ARE JUST BEGINNING!!
Now
about 10 months ago
Trying to print off Error codes only allows you to print to Error Code # E009. Required for Technicians.
about 10 months ago
After reading the questions and answers above, I was a little shocked to find that someone else is having the “Gas” smell out side of their house from the Tankless waterheater. We had the original salesman back to check this and after two or three times of coming and going could NOT find out why this was happening? He then said there was nothing he could do and has not returned since although he did say he would look into it further. We have now had this problem for coming on three years and no sloution. Natural gas IS too expensive to waste but what can we do from here on?? Our other problem at this moment is the 38e message we are getting weith the red light, but again after reading the above, we will try the suggestions to see if it can be rectified.
I would be very happy to receivea reply by e-mail from you with suggestions about the “Gas” smell.Thank you for you time…
We have heard a lot of horror stories about the Navien since buying ours and hope that we haven;t made a huge error in purchasing it.
about 11 months ago
I bought a Navien CR-210A in mid 2009 and just noticed that there is no cold water inlet filter installed. Do you know if some units don’t include this or if the plumber probably ended up with some spare parts after he finished (like the cold water filter) and didn’t say anything. Thanks
about 1 year ago
update 1/7/11 Heater tends to shut down at night and has to be reset. The last time this happened Tec. support said to recalibrate board. This time we are going to try another board altogether
just had code 003E on Navien tankless and code 02.00it ended up being the pressure switch for air. this is located at top on right side. the one with one yellow circular sticker. the one with two is on the bottom and is the gas one
about 1 year ago
just had code 003E on Navien tankless and code 02.00
it ended up being the pressure switch for air. this is located at top on right side. the one with one yellow circular sticker. the one with two is on the bottom and is the gas one.
Mohr Heating & Cooling LLC
about 1 year ago
Why do you ask a online marketing company, call Navien directly and ask them, thats what their tech dept is for.
1-800-519-8794
about 1 year ago
Our Navien 210 is giving us an error code E10. We have checked the pipe for obstructions and cleaned the filter -works for a bit then gives us the error again -each time it quits we check the pipe and the filter and there’s nothing there. If we unplug it and leave it for a bit it works again for very short time. Could the sensor be screwed?? Suggestions?? We are getting very frustrated and thinking of going back to a traditional gas heater.
about 1 year ago
It needs to be serviced by a Navien tech to clear the system. Sometimes unplugging the system will get rid of this error but it will likely pop up again in the near future.
Call this toll free number and they can explain in full detail. 1-800-519-8794
about 1 year ago
There is a lot of unknowns here… is it a tankless or conventional tank? is it old or new? I would have the company that installed your unit come out and take a look. Natural Gas too expensive to just be venting outside!!
about 1 year ago
I would look at getting a service technician in if you are not comfortable with disassembling your Navien tankless water heater.
The issue could be a number of things, pump jammed or foreign material blocking it.. etc etc.
about 1 year ago
about 1 year ago
I have a navien with error code 03 e and underneath it has 002 which is not an explained error code in the chart above. What does it mean? The heater runs for a minute or 2 and then stops with red light flashing this error code. Please advise.
about 1 year ago
I was replacing a window at a friends house the other day and could smell unburnt natural gas. She informed me that it was comming from the hot water heater. She also said the more it’s used(morning showers) the worse it is. If you can help it would be greatly appreciated
about 1 year ago
The error code we get is E010 which is abnormal air pressure, we got it in the winter because frost was forming, now we are getting it in the summer. The vent and exhaust is right above our airconditioner and I’m wondering if that is what the problem is. This has become very frustrating for us as it is now happening year round and resetting it isn’t working anymore. Could the air being sucked up from the A/C have something to do with it? Could just high winds cause it…
about 1 year ago
I am getting an error code e21. Troubleshooting guide says to check thermistor/replace thermistor. How do I check it? This is a new install. We had hot water for a few days, but it just stopped working. Any suggestions?
Thanks!
about 1 year ago
I have a Navien R210 than is not working. There is a flashing red light on the display and what I believe is an error message 038. After looking up the error message I am to check a number of item: 1. Check the circulation PUMP. 2. Check the water flow sensor and 3. Check the cold water main. How would I go about doing this?