Question about Rheem RTG-74PVN-2 Natural Gas Pronto Whole House, Natural Gas, Tankless Wat

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Heater shuts down with C4-13 code

Rheem tankless shuts down after a couple of minutes. Error code c4 - 13 (alternating). Then I have to reset th unit: turn off & on via the remote and the error code goes away until the next time we use the unity.
I called Rheem but they couldn't tell me what c4-13 means....

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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.

Posted on Aug 02, 2009

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