21
TEMP-HEAT
®
Problem Probable Cause Remedy
Blower runs, burner
does not ignite
Flame safety control
lockout
Press reset button on the control. If resetting does not
correct problem, the flame safety control must be
replaced.
Gas valve defective Check wiring connections and condition to and from gas
valves. If wiring is in good condition and voltage is
present, the valves may need replacement.
Fuel supply Confirm gas supply to unit. See Rating Information
Table on page 5 for inlet gas supply pressures.
Bleed air from gas hose.
Ignition spark rod
improperly gapped
Maintain 1/8-in gap as shown on page 19.
Replace spark rod as needed.
Burner ignites, does
not stay lit
Spark rod defective Turn blower and burner switches OFF. Check spark-rod
gap and condition. Carefully inspect porcelain insulator
for cracks or moisture. Replace if necessary.
Insufficient air flow Check unit's intake and discharge for obstructions.
Inspect fan blade and motor for proper operation.
Adjust airflow control according to the instructions on
page 19.
Remove airflow tubing and inspect for obstructions.
Reconnect tubing.
If voltage is present at Terminal 7 but not at Terminal 8,
replace the airflow switch.
Blower runs, burner
ignites, but unit does
not deliver high fire
Fuel supply Confirm gas supply to unit. See Rating Information
Table on page 5 for inlet gas supply pressure.
Remote thermostat Plug remote thermostat securely into thermostat jack on
heater. Set at a temperature higher than the indoor-air
temperature.
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