14
Problem
Fan cuts off.
Fan will not run with
heat in furnace.
Fan runs continu-
ousIy without heat.
Possible Cause
Normal if temperature
in furnace drops below
90° F.
No power to furnace.
Bad thermostat, relay,
or fan.
Fan has overheated.
Switch on bottom of
fan box is in “on” posi-
tion.
Stuck thermostat or
relay.
Solution
Turn switch on bottom of fan box to
“on” if you desire fan to run below ther-
mostat temperature range.
Check electrical supply.
Turn switch on bottom of fan box to
“on” position to attempt to regain fan.
Call your dealer or electrician.
Insure louvers on side of fan box are
clear.
Fan will come on once it cools down.
Move switch to “auto” position.
Replace defective parts.
WARNING
Unqualified individuals should not remove the fan box
access panel. Personal injury or furnace damage can result.
CALL AN ELECTRICIAN OR YOUR DEALER!
Problem
Smoke or fumes
from vent.
Excessive smoke
coming out of loading
door when loading.
Puffs of smoke
coming through
damper box.
Improper seal around
door.
Possible Cause
Normal for new furnace.
Smoke entering through
louvers on side of fan
box.
Bad weld or broken
seal.
Insufficient draft.
Insufficient draft.
Down draft on chim-
ney.
Torn or loose gasket.
Worn or compressed
gasket.
Solution
Disconnect supply duct until it clears.
Reposition of lengthen stack so that
smoke does not settle on furnace.
Try to avoid smoke from loading door
by opening slowly.
If problem persists, louvers can be cov-
ered with tape.
Closing off louvers
will prevent fresh air from being
brought into building and can lead
to fan overheating. Observe furnace
closely to insure that fan does not
shut off.
If above do not fix problem, contact
your dealer immediately.
See above.
See above.
Check for obstructions near chimney,
trees, buildings, etc.
Replace gasket.
Reverse latch for tighter fit.
Replace gasket.
Summary of Contents for 300
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