Rheem GHE80SU Use & Care Manual page 43

Before You Call For Service...
Alarm ('A')
and Alert
('T') Codes
Ignition lockout due to a total of 9 consecutive failed
A001
ignitions. This will disable the heater.
Flame not stable lockout. Lost flame three times during
A002
one heat cycle. This will disable the heater.
The intake pressure switch was detected open when
A003
the blower was running. This will disable the heater.
The proof of air flow switch was detected open during
A004
heating operation. This will disable the heater.
The proof of air flow switch was detected open during
A005
pre-purge operation. This will disable the heater.
The proof of air flow switch was detected open during
A006
post purge operation.
Exhaust flue pressure switch was detected open during
A007
heating. This will disable the heater.
The proof of air flow pressure switch was detected
A008 closed before the blower started operation. This will
disable the heater.
Gas pressure is below minimum specified. This will
T009
cause difficulties lighting the unit.
Description
43
Current Alarm Screen Display
A001 Ignition lockout.
->Clear error code by turning the unit off/on. If
problem persists, please contact technical support or
service provider.
A002 Flame is not stable.
->Clear error code by turning the unit off/on. If
problem persists, please contact technical support or
service provider.
A003 Intake Switch open. Check Wiring/Venting
->Check switch wiring and venting. If problem
persists, please contact technical support or service
provider.
A004 PoF Switch error H. Check Blower/Wiring.
->Check switch wiring and venting. If problem
persists, please contact technical support or service
provider.
A005 PoF Switch error E. Check Blower/Wiring.
->Check switch wiring and venting. If problem
persists, please contact technical support or service
provider.
A006 PoF Switch error P. Check Blower/Wiring.
->Check switch wiring and venting. If problem
persists, please contact technical support or service
provider.
A007 Exhaust Switch open. Check Wiring/Venting
->Check switch wiring and venting. If problem
persists, please contact technical support or service
provider.
A008 PoF Switch/Blower mismatch. Call Tech Svc
->The Proof of Fan pressure switch is closed when
the blower is off. Please contact technical support or
service provider.
T009 No Gas detected. Check gas connections
->Verify gas supply to the unit. Check wiring to the
gas pressure switch. If problem persists contact techni-
cal support.