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0417 IH-6511
WIRING DIAGRAM
C
o
nt
ro
l Va
lv
e
Ignitor
Black
Black
Black
Motor
Power Cord
Earth (Shell)
Blue
Blue
White
White
White
Green
Condenser
Blue
Blue
Fuse
Yellow
Thermal Switch
PCB Assembly
Spark
Module
Ea
rth
Yello
w
Th
er
m
oc
o
up
le
OPERATING ISSUE
CAUSE
RECOMMENDATIONS
Fan does not turn when electricity
is connected.
No electric power to heater.
Blades of fan in contact with
heater housing.
Fan blades bent.
Fan motor defective.
Check current at outlet. If voltage is correct, inspect extension
and power cords for cuts, frays or breaks
Check housing for damage. Be sure there are no dents in the
housing obstructing the fan.
Straighten all fan blades.
Replace motor assembly.
Heater will not fire (ignite).
No spark at module.
Incorrect spark gap.
Corroded electrode.
Inspect module wire. Re-attach or tighten if loose. Inspect
spark module and replace if necessary. Inspect all other
electrical components.
Set plug gap to 0.16".
Replace spark plug (multi-bracket assembly).
Heater stops running by itself.
Temperature inside heater is too
high, causing thermal switch to
shut down operation.
Damaged control valve.
Dust or debris accumulated in
heater.
If the heater input or output is restricted, the inside temperature
can become too hot. Keep the areas in front and behind
heater clear of obstructions.
Replace control valve.
Clean inside of heater.
TROUBLESHOOTING
LOCATING YOUR SERIAL NUMBER
Your serial number can be found on a white label on the right side cover of your heater. It will begin with the letters
"HGF" followed by eight digits. For example, HGF12345678.
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