Rheem 64DV - Error Code

52 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
52
15 – Error Code
Explanation: The hot water temperature and/or heat
exchanger temperature reached 207 degrees F for
more than 15 seconds.
Diagnostic Checks:
 GAS SUPPLY & VENTING (refer to pages 8-11)
 Sediment build-up in heat exchanger
 Heat exchanger thermistor
Sediment Build-Up Diagnostics
Go to Error Code 1L for flushing instructions.
Heat Exchanger Thermistor Diagnostics
Go to Error Code - 32 for heat exchanger thermistor
diagnostic instructions.
IMPORTANT: Inadequate GAS SUPPLY and/or VENTING
will create hot spots in the heat exchanger.