Question about Rheem Paloma PTG-74PVN / RTG-74PVN Natural Gas Indoor

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Paloma PTG-74PVN power turns off by itself

I had this tankless water heater installed a little less than 1 1/2 years ago, and it worked fine until about 2 weeks ago. Now, randomly, the power will turn off, and the water will go cold. It happened once a couple weeks ago, then again a few days later, and this morning, 3 times during my shower (less than 10 minutes). There is no error code on the remote control - it just powers off. By turning off the water and hitting the "power" button on the remote, it will come back on at least temporarily, but then shuts off again. Any ideas?

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  • carebear_cmr Sep 12, 2009

    I called tech support, they walked me through entering "maintenance mode" as otah described, but the remote didn't flash a code - just two dashes. They suspect a motherboard/computer issue, and will be sending another one next week sometime.

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Turn the water flow off and control off and hold the two arrow buttons together
then use the up arrow to get to e and the down arrow to get to 1 what do you see?

Posted on Sep 10, 2009

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Went to 1e and


i got 90

Posted on Sep 11, 2009

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