Question about Rheem EcoSense by 4.2 GPM Tankless Water Heater LP Gas

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I have a natural gas eco Sense tankless hot water heater.I will turn it on and it will work fine. then I shut it off and if I turn it back on I will get an error code c2 will blink then 11. I will then turn it off, the keypad will reset to the temp. number, I will turn it on and get the same message. may after about 2 or three time then it will ignite and work.

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Try cleaning your spark rod inside the unit and the other rod next to the spark rod on the side of the unit. Takagi use a emery cloth, rheem brass brush, noritz a emery cloth. but make sure that both of the rods that are in the flame chamber are very clean. It miss reading because of build up on the rods.

Posted on Oct 06, 2010

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http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html
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I turn it on and it looks like everything is fine we use the hot water and it turns off and starts flashing C-7 & 76 before when it would shut down we would pull the pour cord and wait a minute and...


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

Read manual thoroughly for troubleshooting and yearly maintenance requirements.
The manual has basic error codes and possible self-repair tips, but the same problem on one person's unit can be a different problem and different solution on another unit.

Repair most tankless problems yourself, same day, any brand for about $330
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Upvote the help.
And take advantage of fixya expert assistance live.
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the filter is a black plug located on the cold water line (labeled cold on the bottom of the unit). It points torwards the left.

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