Rheem 64DV - Error Code

58 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
58
31 – Error Code
Explanation: Inlet thermistor malfunction.
Diagnostic Checks:
 Inlet thermistor
Connector Location
On Page 14
Turn Power OFF.
Remove connector R. Measure resistance
between #3 wire (Black) & #6 wire (White):
7K – 23K Ohms
Reinsert connector R.
Operate unit.
IF Error Code 31 appears:
Replace control board.
YES
Remove control board
bracket to access inlet
thermistor Molex near
blower motor
(How to Remove: Section 1).
Continue diagnostics
on next page.
NO
CONTROL
BRACKET