Instructions / Assembly

19
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.
• 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.
Possible Causes:
Remedies:
• White button on fan limit control
is pushed in.
• 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.
• Open backdraft damper.
• Defective fan limit.
• Improper wiring.
• Backdraft damper is in the
“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 sufciently 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.
• Opening the door has provided
additional oxygen which has
ignited the accumulated gases
from partially spent fuel.
• Always open the door cautiously and allow the safety latch system
to perform its designed function, containing gases within the re
chamber.
Possible Causes:
Remedies:
3.
• Open damper.• Cast iron damper in the
“CLOSED” position.
• Insufcient natural draft or an
obstruction in the ue system.
• See #6 and #9.
• Fire chamber lled to capacity
with unburned fuel.
• Do not attempt to overload the furnace.