How to reset a TM50 error code - RTO Takagi T-K3 Flash Gas Tankless Water Heater

Remove the bird's nest in the flue.

The 10, 59, 90 and 99 error codes indicate that a Noritz heater has experienced a combustion abnormality. In most cases, it is the result of an obstruction in the heater's flue. Examine the flue to see if it is blocked by debris and clean if necessary.

How To Resolve The Seven Most Common Noritz Tankless ...

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Nov 16, 2015 - This error code involves a breakdown in communication between two tankless water heaters using the Quick Connect Cord. It can occur when more ...

Troubleshooting Noritz Tankless Water Heaters and Error Codes

home-water-heater.com https://www.home-water-heater.com > noritz-error-co...
Error code 90 and 99 ... Action: Check for the obstructed venting, improper gas burning (flame shape and color change). Ensure the water heater gets the ...

Error Codes for a Noritz Water Heater - Waterheatertimer.org

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You have to fix the root cause before you reset it.

https://www.google.com/search?q=Clearflow+Bestway+Pool+Heater.+It+has+an+E6+error+code

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No, there isn't an Error 09, but there is a E19.

https://www.tanklesshotwaterguide.ca/about/rinnai-tankless-error-codes/

https://www.google.com/search?q=Rinnai+E110CN+error+E09

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Error E02 indicates that the water temperature exceeded high limit.

Switch off the house circuit breakers dedicated to the water heater and then press the reset button located behind the control panel on the water heater.

Switch house circuit breakers back on.

If error persists, call a service engineer.

good luck

1L is scale build-up in heat exchanger: delime tankless unit:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html#delime

If error code will not reset afterwards, then holding both arrow buttons down on remote might reset error code.
Models have changed since this pdf was posted in 2008
http://hometips.me/Tls/Clear-fault-history-Service-manual-2008.pdf

If error does not clear, then call Rheem and expect them to try to sell you a service call.

Gene

Water Heater Timers Save Money

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

First thing to try for any electronic problem is unplug the machine and see if problem resets.
Before calling service technician, open following link for Rheem tankless resources including error codes and possible manual and Rheem chat and contact:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Error code 2 and 3 do not show on Rheem/Paloma charts or in typical manual.
Error codes are generally considered start places for troubleshooting.
Multiple error codes can mean PC board failure, but same problem on one unit can have different cause and solution than another unit.

Read the manual and make sure yearly maintenance is caught up.

Add a comment and say what you did to solve problem.

It wont reset if you turn the breaker off?

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