Error Code - Rheem 64DV Troubleshooting Manual

66 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
Explanation: Improper thermistor connection. Unit
has four thermistors; one or more possibly has a poor
connection or not connected in proper location.
Diagnostic Checks:

Inlet, heat exchanger, outlet, & ambient
thermistors
Turn Power OFF. Remove connector R .
Test ALL thermistors.
Follow Instructions for:
31 – Error Code
32 – Error Code
33 – Error Code
34 – Error Code
66
35 – Error Code
Turn Power ON. Operate Unit .
Does 35 – Error Code Appear?
Unit had a loose connection.
Thermistors appear to be
OK.