Question about Rinnai RHFE-1004FA 38,400 BTU Energy Saver Ductless Heater - LP Gas

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Thermostat beeps when tankless heater goes on. 12 flashes on readout

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  • blender719 May 11, 2010

    Error is on the energysaver when the water heater starts??? LPG or NAT Gas??

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  • 12 Answers

That is a code which your owner's manual will assist you in finding. Usually 12 is ignition failure, such as no flame reading from the sensor, or lack of fuel. If the unit isn't grounded properly, it won't verify flame properly. Could be caused by a dirty flame rod, faulty gas valve or no fuel to unit.

Posted on Sep 14, 2009

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1 Answer

My rheem was flashing IL . I flushed with 2 gallons of vinegar for 45 minutes. however when I restarted it still is flashing IL. Does something in the remote need to be reset?


Before calling service technician, open following link for Rheem tankless troubleshoot resources, including on-line chat
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Rheem technical service bulletin for de-liming:
http://waterheatertimer.org/pdf/Rheem-De-lime-tankless.pdf

De-liming Manual says:
10. Turn on the water shutoff valves, run a hot water tap to
purge any air from the water lines and check the system
for any leaks.
11. Turn on gas, electricity, and remote control thermostat
and set the desired temperature.
12. Run hot water from several locations to check the operation
and performance of the water heater.
If you have difficulties please contact the Technical Service
Department at 1-800-432-8373 or your local service agent.

Apr 18, 2011 | Rheem Tankless Water Heater Main Remote...

1 Answer

Thermostat flashes IL ? Model PTG-53PVN


http://www.palomatankless.com/owners/homeowner+trouble.lasso#28-11
The Controller displays error code "1L."
There is a build-up of lime in your Paloma.
Contact your plumber to service the Paloma by flushing out the lime.
Also search u-tube for flushing lime out of tankless.

Dec 29, 2010 | Rheem Paloma Tankless Water Heaters...

1 Answer

Just installed a reem rtg tankless unit fires up then shuts down and flashes c7 12 the until will work if I balance water valve way down


I am a free answerer, and I specialize in giving you resources for free
The paid answerers may have a person who knows your product and the error codes
The manual will also have the error codes.
The person who installed the unit will also know the error codes (or should know)
Each day I see 20-25 unanswered questions about tankless water heaters.
The number of questions shows the complexity of the machines, and the inability of the manufactures to take care of their customers.
The manufacturer will refer you to the installer.

http://www.thetankatwaterheaterrescue.com/forums/forum3/

http://www.rheem.com/products/tankless_water_heaters/
The link above goes to Rheem tankless water heaters
Click on a product and it opens a page showing many tankless models
Click 'more information' and another page opens with spec sheets and other pdf
Not surprisingly there are no troubleshooting steps or troubleshooting flowcharts
There are plenty of ways to buy a tankless
There are not many ways a do-it-yourselfer can fix a tankless

Oct 30, 2010 | Rheem RTG-53PVN Indoor Natural Gas...

2 Answers

I have a Rinnai tankless gas water heater and this things beeping and flashing 12 everytime we turn on the hot water the water will get hot but you have to wait for it to stop beeping


Error 12 is failed ignition - this can be caused by many things, but normally a low gas pressure, or no gas pressure upon ignition.
Try turning the hot tap on very slowly till till the control shows burner is lit. Then turn it on faster. If it stays going with no error, you might have a faulty regulator, not opening fast enough to meet demand. Especially common with lpg models,a lot rarer on natural gas.

Oct 27, 2009 | Rinnai Water Heaters

1 Answer

Rinnai tankless water heater


LC is the error code that you get when you have limescale buildup in the heat exchanger. You need to flush your heat exchanger. If you have the manual for your water heater, use it. The manual to mine is attached. The procedure for flushing it is covered on page 12. I suggest that you have a certified Rinnai plumber perform this task as it requires a ciruclating pump and some hoses that you need to connect to your water heater. If you don't perform this task, it is possible that you will need to replace your heat exchanger and this is not something covered by Rinnai's warranty.

Sep 21, 2009 | Rinnai Webstone The isolator EXP tankless...

1 Answer

This things beeping and flashing 12 everytime we


check the error codes on it by pressing the on off button for 2 seconds then while holding the on/off button press the up button this should display the last 9 error codes let me know what they are

Jul 28, 2009 | Rinnai Water Heaters

1 Answer

No hot water from tankless water heater. Bliniking Readout


http://www.rheemtankless.com/content/tankless/rheem/help.shtml

This is there website.Above.
Use the live chat to ask them, the code you listed does not seem to correspond to there code list, the only code that does is code 76,
which is a problem with the remote control not talking to the unit.
So your best bet is to tell them the error.

Apr 07, 2009 | Rheem Tankless Water Heater Main Remote...

1 Answer

HI, I have a Bosch tankless water heater with electronic ignition and no pilot light. The heater will work great for a week or so then it will cut off for no reason and flash P2 in the readout. If I...


Actually E2 means the water is too cold. P2 is a computer program setting.

Check the connection of the temp sensor itself, maybe its broke on the inside if a new temp sensor didnt fix the problem.

Oct 03, 2008 | Terminator Aquastar 125FX Tankless Water...

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