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Furnace Fails to Operate
If the furnace does not operate check the
following:
1. Is the thermostat operating properly?
2. Are the blower compartment door(s) in
place?
3. Is the furnace disconnect closed?
4. Has the circuit breaker tripped or the con-
trol board fuse burned open?
5. Is the gas turned on?
6. Are any manual reset switches open?
7. Is the filter dirty or plugged?
8. Is the flame sensor coated? (Remove and
clean with emery cloth.)
If the furnace locks out after 5 attempts for
ignition, it will try again every hour if a call for heat
remains. If the inducer and circulating air blow-
ers are operating, and items 1 through 8 have
been checked, press the red reset button on the
vent safety switch. (See Figure 29.) If the
furnace operates after depressing the reset
button, contact a qualified serviceman to identify
and repair the problem.
If the furnace continues to not operate, depress
the red reset buttons on the flame rollout
switches. (See Figure 29.) If the furnace oper-
ates after depressing the reset buttons, contact
a qualified servicemen to identify and repair the
problem.
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