How do i find o rings in a tankless for air intake

Error code 13 referrs to the gas pressure and or venting issue. Please ensure the gas pressures are correct and the vent is free of any obstructions. It also may be a failed ecu chip. Service tech may be required but first check for obstructions in intake/exhaust venting. Bird nest- bees and foreign material.

1) Copy following links for Rheem tankless error codes
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
http://waterheatertimer.org/pdf/Tankless-Error-code-13.pdf

2) Maintain water heater as shown in product manual to avoid common error codes.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

10-15-2012

Code 13 is probably Rheem, Richmond, Ruud, Paloma etc tankless.
Copy following link for troubleshoot resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error 13 is oxygen depletion sensor
Imperfect combustion.
For example if tankless does not have required maintenance, then burner can get dirty and clogged.
This will cause unburned natural gas to rise inside hot flue pipe causing risk of explosion and fire, or in case of propane gas that is heavier than air, the gas will build up inside combustion chamber and cause explosion and fire.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Why is it always Rheem problems?
Every water heater problem at fixya is Rheem.
And Rheem doesn't post any service manuals, like the other two big manufacturers, AO Smith-American, and Bradford White.

Rheem 2012 manual says if error 13 still displays, then contact installer or service technician. Mo Money buddy.
This is about oxygen sensor, poor combustion, bad venting, inadequate air supply, failed sensors, etc.
Get more fresh air to unit and see if that solves problem. The call service technician, and get out wallet.
Copy following link for Rheem-richmond tankless troubleshoot.
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Maintain water heater according to instructions in manual to avoid common error codes. Of course this means you have to service the unit each month, and each year, without guarantee the thing will work correctly.


If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Before calling service technician, open following link for Rheem troubleshoot resources including error codes, Rheem chat, and possible manual:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are considered start-point for troubleshooting.
Error code C4 13 is bad oxygen sensor, inadequate incoming air supply, or bad venting. Also bad PC board, or internal wiring, or temperature set too high, damaged burner parts.
http://waterheatertimer.org/pdf/Error-code-13.pdf
http://waterheatertimer.org/pdf/Bosch_Ventilating_tight_houses.pdf

Tankless require yearly maintenance to combustion chamber and burner parts.
Prescribed maintenance can correct some of the issues in error code 13.

Before calling service technician, open following link for Rheem troubleshooting resources:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error codes are consider start-point for troubleshooting:
Following example information might help.
http://waterheatertimer.org/pdf/Error-code-13.pdf

This means the air intake cover problem.
21
Malfunction of Air Intake Filter Switch Ensure air filter door is properly seated. Ensure front panel is properly installed.
Error codes here: http://www.palomastore.com/paloma_error_codes.html

The gas pressure must be increased at the regulator from 9 inches of water column to about 12.5-13 inches of water column. The CO2 levels need to be adjusted for each installation. The air intake MUST come from outside the same wall as the exhaust. I have never seen any manufactures tankless unit installed properly. Plumbers do not read the manual.

I think error code C8 is #13
It has to do with air quality, lack of sufficient air, or lack of venting or dirty air filter.
Check following links to see if they have information:

Check following link for recall list:
http://www.tankless-recall.com/tanklessSearch.aspx
Manual shows error 05 or 13:
http://waterheatertimer.org/pdf/Rheem-RTG74IndoorOutdoor_owners.pdf

your not getting enough fresh air to it. where is it located? you need 1 square inch per 1000 btu's. it's having irregular combusion.