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44 TROUBLESHOOTING
NO
YES
Replace the control
board (page A-8).
Correct wiring.
NO
YES
YES
Troubleshooting:
F8: HEAT LOW
YES
NO
Is the high-limit
thermostat tripped?
Are both blower motors moving air?
Check in
TEST MODE - see page 15.
YES
Reset (page 34) and
determine why it
tripped – excess
grease buildup, etc.
NO
See page 39
to troubleshoot
F1: BLOWER
(Blower Running
Status Bad)
NO
Is the solid state relay
defective or damaged?
Is the heater defective? Check in
TEST MODE - see page 15.
Replace defective
heater. (page A-11)
Verify the solid state
relay is not shorted
across output.
Replace the solid state relay
(page A-5 through A-6).
Is the wiring from the solid
state relay to the control
board OK? (See page 51 for
schematic.)