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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.
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
warm
Health screens for issues that need attention. Pressing the
blinking health indicator will show the health screen.
Settings
Problem
Display not on
Blower does not run
Unable to light
the main burner
40
120°
hot
Status
Possible Causes
No power to the unit
Harness from control board disconnected
No power to blower motor
Air in gas line
Manual gas shut-off
valve(s) not open
Blocked inlet or exhaust vent pipe
Pressure switch
Wire connection not fully secured
Status: Standby
120°
very hot
warm
Settings
Status
warm
Service
What To DO
Check the breaker to the unit, the on/off switch, and the fuse
Settings
on the ignition control board.
Make sure that the wire harness to J4 on the ignition control
board is still connected.
Verify power to the control board and that all harnesses to
the blower are properly installed. Make sure that there is no
damage the harnesses or connectors.
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.
Check to make sure that all manual shut-off valves between
the unit and the gas line are open.
Contact a qualified service technician to evaluate vent pipes
for a blockage.
Make sure the pressure switch hoses are not "kinked" or
disconnected.
Blocked inlet or outlet vent systems will cause pressure
switch to shut off the unit. Contact a qualified service
technician to evaluate the vent system.
Contact a qualified service technician to confirm wire
connections.
120
Status: Standby
hot
very hot
Disable
Service
Disable
Status
hot
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