These Rheem hot water heaters are fitted with self diagnostics electronics. When a fault occurs, the heater will shut down and the fault with a pair of digits will be displayed on the display screen. Refer to the following table for probable cause and suggested remedy.
Fault Condition : EZ Link
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Imperfect Combustion Alarm
Book service call.
Book Service, Call 1800 633 920
Fault Condition : Abnormal low rate combustion
Book service call.
Book Service, Call 1800 633 920
Fault Condition : Ignition failure at start up
LPG users check Propane bottle level. Close hot tap, cycle power on and off at GPO and open hot tap again. If fault re-occurs book service call.
Book Service, Call 1800 633 920
Fault Condition : Flame failure during operation
LPG users check Propane bottle level. Close hot tap, cycle power on and off at GPO and open hot tap again. If fault re-occurs book service call.
Book Service, Call 1800 633 920
Fault Condition : Over heating
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition :Very high temperature
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Outlet water temp too high
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Operational switch faulty
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Heat Exchanger Outlet Temp. Too Low
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Inlet thermistor open circuit
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Heat exchanger thermistor open circuit
Item to check : Book service call
Fault Condition : Outlet thermistor open circuit
Item to check : Book service call
Fault Condition : Ambient air thermistor open circuit
Item to check : Book service call
Fault Condition : Thermistor connections crossed
Item to check : Book service call
Fault Condition : Gas cut off malfunction (SV0 failure)
Item to check : Book service call
Fault Condition : P.G.F.R control failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Bypass solenoid failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Abnormal fan speed or fan failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Malfunction of water volume control motor
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Water By-Pass Control Fault
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : G.I.S valve control failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Detected false flame
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Vent type control data failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Communication problem between remote controller and water heater
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Fan motor current detection failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Fan motor current detection failure
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Gas cut off defective
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : No false flame detected
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Functional problem on gas type circuit board
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Decrease in fan motor ventilation.
Item to check : Book service call.
Book Service, Call 1800 633 920
Fault Condition : Decrease in fan motor ventilation. (Operation stop)
Item to check : Book service call.
Book Service, Call 1800 633 920
Errors signal issues like ignition failure, flame problems, heat exchanger faults, or communication errors.
Power off for 30 seconds, then restart; use the reset button if available, or call a technician if errors persist.
Minor resets and sensor cleaning may be DIY, but persistent or electrical issues need professional service.
Flush annually, clean filters, check ventilation, maintain water pressure, and schedule yearly servicing.
If errors persist, hot water stops, or you detect gas leaks, electrical faults, or unusual noises.
