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Problem: Draft blower will not run. NOTE: Verify that the wall thermostat is in the
“HEAT” position, and make sure batteries are installed.
Possible Causes:
Remedies:
• Defective wall thermostat.
• This can be checked by turning the thermostat to a temperature
setting that is higher than the temperature in your home. If the draft
blower does not operate, the thermostat may be defective. Replace
if necessary.
• Move switch on wall thermostat to the “HEAT” position.
• Replace transformer relay center.
• Replace draft motor.
• Wall thermostat is in the wrong
position.
• Defective transformer relay
center.
• Defective draft motor.
4.
• Review wiring diagram. If unit is wired correctly, seek professional
assistance.
• Improper wiring.
Problem: Circulation blower will not turn on.
• Defective fan limit control.
• Remove fan limit control cover and look for the word “Caution.” If it
is upside down, replace fan limit.
Possible Causes:
Remedies:
5.
Problem: Excessive dirt accumulation surrounding air registers in the home.
Possible Causes:
Remedies:
• Furnace is not connected to
return air duct and is disbursing
dirt throughout home.
• Connect to return air duct system.
• Install filter and check frequently.
• No filter in return air system.
6.
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.
7.
