Make sure the gas bottles are open. Sometimes the simplest answers are the best. Once gas bottles are opened try using the system again and it should reset with the code ‘on’.
Error 11 is ignition failure, or insufficient gas, or defective sensor, dirty combustion parts.
Do the yearly required maintenance such as cleaning the combustion parts, and error code will probably be solved.
Problem is Rheem does not post service manuals for people to learn how to service their equipment without calling service tech.
Copy following link for Rheem troubleshoot resources
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
The cost of yearly maintenance will easily eat away the expected yearly savings of $100 for typical family of 4.
If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
SOURCE: rheem tankless water heater wont lite
the system was not sized properly, you need to have a 3/4 gas line to the unit for the volume of gas it needs, the tankless water heaters need to have every bit of gas that is says, it sounds like who ever installed di not make sure you had enough gas comming in the house, you might have to either have a new meter installed or run the gas lind directly from the meter to the water heater and cap off the gas line thats there
SOURCE: tankless water heater error code 11
I was having the same problem untill I reallized it was my venting system. Test the water heater with no vent on top. Disconnect the vent pipe from the water heater and try turning on the hot water. the water heater needs a special adapter to vent the direct vent water heater. One other thing you can check is the gas pressure in your home. You have to have between 7 and 8 WC (water Column) for the tankless water heaters. You can call your gas supplier to find out what you have.
SOURCE: How do I delete the stored error codes on my Rheem
Some error codes cannot be reset...Example would be P/S failure on the PCB. Any other error, if you remove power for approx. 2 min - error should clear. - if not you need to contact Paloma/Rheem customer (800-432-8373) support
SOURCE: I have a 1L error code. Can you help?
Hi stevenandarl,
Contact Paloma/Rheem customer (800-432-8373) support; tell them the code you are displaying. Rheem will send you instructions via email if you feel you can perform this operation yourself. Or they will recommend a professional in your area to help you.
Mike...
SOURCE: Can't find manual & have a C7 error code.
need to contact rheem what you can do until then is remove the control wire it will run until parts ship out
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