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Before You Call For Service…
Troubleshooting Tips
Save time and money! Review the charts on the following pages first and you may not
need to call for service.
Problem
Possible Causes
What To Do
Display not on
No power to the unit
Check the breaker to the unit, the on/off switch, and
the fuse on the ignition control board.
Harness from control board discon-
nected
Make sure that the wire harness to J4 on the ignition
control board is still connected.
Blower does not run No power to blower motor
Verify power to the control board and that all har-
nesses to the blower are properly installed. Make
sure that there is no damage the harnesses or con-
nectors.
Unable to light
the main burner
Air in gas line
Let the unit cycle at least 3 times to remove air from
the gas line. If the unit does not try to light, contact a
qualified service technician to purge the air from the
gas line.
Manual gas shut-off
valve(s) not open
Check to make sure that all manual shut-off valves
between the unit and the gas line are open.
Blocked inlet or exhaust vent pipe
Contact a qualified service technician to evaluate
vent pipes for a blockage.
Pressure switch
Make sure the pressure switch hoses are not
"kinked" or disconnected.
Blocked inlet or outlet vent systems will cause pres-
sure switch to shut off the unit. Contact a qualified
service technician to evaluate the vent system.
Wire connection not fully secured
Contact a qualified service technician to confirm
wire connections.
Status: Standby
Status
Settings
warm
hot
very hot
Disable
120°
Service
If one of the health indicators is blinking
on the home screen or the service icon is
blinking there is an issue with the operation
of your water heater. Pressing the service
icon will allow you to look at Current Alarms
(and Alerts), Alarm History, and Unit Health
screens for issues that need attention.
Pressing the blinking health indicator will
show the health screen.
Status: Standby
Status
Settings
warm
hot
very hot
Disable
120°
Service
Status: Standby
Status
Settings
warm
hot
very hot
Disable
120°
Service
Status: Standby
Status
Settings
warm
hot
very hot
Disable
120°
Service
