Before You Call For Service - Rheem GHE100-130 Use & Care Manual

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
Display not on
Blower does not run
Unable to light
the main burner
If the screen on the display is flashing, the burner did not
light. To reset the ignition sequence, press the "HELP"
button and then the "OK" button (see Display screen at
left). On initial startup, it might be necessary to clear the
"flashing" screen two or three times, to make sure that
the gas has made its way to the burner. If the unit has
been operating and then shows the flashing display, then
there is another issue to be resolved (unless gas has
been off).
Some basic trouble codes:
A01: burner did not light during three consecutive trials
for ignition.
A25: pressure switch did not close.
A26: pressure switch was not open on initial check.
E21: incorrect polarity on power supply.
Possible Causes
Is there power to unit?
Is display not completely installed?
Is harness from control board connected?
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.
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What To Do
Verify that there is 120 Vac to Control Board.
Make sure that the two pins on the back of the
display are inserted into circuit board.
Make sure that wire harness from Control
Board is still connected.
Verify power to Control Board and that all
harnesses to the blower are properly installed.
Make sure that there is no damage to harness
or connectors.
Let the unit cycle at least three times to
remove air from gas line. If 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 gas shut-
off valves between unit and gas line are open.
Contact a qualified Service Technician to
evaluate vent pipes for 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 unit. Contact a
qualified Service Technician to evaluate vent
system.
Contact a qualified service technician to
confirm wire connections.