Troubleshooting
Problem: Circulation blower runs constantly. NOTE: Make sure the white button on fan
limit control is pulled out and in the “auto” position.
• “Off”setting on fan limit control is
low.
Possible Causes:
Remedies:
• Remove cover on fan limit control and check for the proper setting.
The point indicators should be set at 100° “Off” and 150° “On.”
Do
NOT attempt to adjust the fan limit by manually adjusting the
temperature indicators on the dial.
• Pull white button out and the blower should stop.
• Check by moving “ON” and “OFF” point indicator to a temperature
position where blower should turn off. If the blower continues to run,
replace the fan limit.
• Review wiring diagram. If unit is wired correctly, seek professional
assistance.
• White button on fan limit control
is pushed in.
• Defective fan limit.
• Improper wiring.
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.
2.
Problem: Flames discharging from fuel door during reloading.
Possible Causes:
Remedies:
3.
• Opening the door has provided
additional oxygen which has
ignited the accumulated gases
from partially spent fuel.
• Insufficient natural draft or an
obstruction in the flue system.
• Fire chamber filled to capacity
with unburned fuel.
• Always open the door cautiously and allow the safety latch system
to perform its designed function, containing gases within the fire
chamber.
• See #6 and #9.
• Do not attempt to overload the furnace.
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