TM090 12-26 Series II CFGWH Service Instructions
REV AB
– Issued February 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies
are deemed “uncontrolled”
42
Fault Finding Chart 3.1
YES
NO
False flame detection
malfunction
Ignition failure or
cross light failure
Test 9
NO
Replace the PCB assembly.
NO
YES
Clean or replace the combustion
chamber front panel assembly.
Flame detection problem. Check
condition of flame rod and leads.
Repair / replace as necessary.
YES
YES
NO
NO
YES
Replace the igniter assembly,
electrode or cable.
3.1
3.3
Replace the PCB assembly.
YES
3.2
NO
Test 12
Is error code 72
displayed?
Is flame detection
signal in
maintenance
information 00?
Is error code 11
displayed?
Did the burner
ignite momentarily?
Did the igniter
spark?
Is voltage supplied
to the igniter?