Troubleshooting
19
Problem: Circulation blower will not turn on.
• Defective fan thermodisc switch.
• If the blower fails to run, replace the fan thermodisc switch.
Possible Causes:
Remedies:
• Defective motor.
• Contact your supplier for replacement.
• Review wiring diagram. If wired correctly, seek professional
assistance.
• Open backdraft damper.
• Improper wiring.
• Improper wiring.
• Damper in closed position.
1.
Problem: Circulation blower vibrates during operation.
• Screw on squirrel cage is not
tight.
• Check squirrel cage alignment and position so that it does not drag
on the housing during rotation, then tighten the screw sufficiently to
fasten the squirrel cage securely to the shaft.
Possible Causes:
Remedies:
• Balance weights on squirrel cage
have become dislocated.
• You may attempt to adjust the weights yourself to obtain an
acceptable balance. If you are unsuccessful, contact your supplier.
• Return the blower to your supplier for replacement.
• Defective main bearings.
3.
• Review wiring diagram. If wired correctly, seek professional
assistance.
Problem: Circulation blower runs continuously.
2.
Problem: Odor detected in home during initial firing.
• There is an oily film that remains
on the steel after the manu-
facturing process. Firing the
furnace has raised the tempera-
ture of the fire box to a level that is
sufficient to vaporize the residue.
• The odor should disappear after a few hours of usage.
Possible Causes:
Remedies:
4.
Summary of Contents for FC300F
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