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    what does p 1 mean on my tankless heater mean.

    0  Views: 454 Answers: 1 Posted: 11 years ago

    1 Answer

    P1 means tankless water heater is not sensing enough hot water volume being pulled by the fixture either shower head or faucet. The solution is remove any water saving device from fixture this could be a filter or rubber washer around green filter. Heater is not design for this device and reduce the hot water volume. Another solution is clean shower head or faucet outlet with CLR soultion. Source: http://www.fixya.com/support/t8555196-get_p1_error_code_rheem_tankless 





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