4.
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.
• Wall thermostat is in the wrong position. • Defective transformer relay center. • Defective draft motor.
• Replace transformer relay center.
• Replace draft motor.
• Review wiring diagram. If unit is wired correctly, seek professional assistance.
• Improper wiring.
5.
Problem: Circulation blower will not turn on.
Possible Causes:
Remedies:
• Defective fan limit control.
• Remove fan limit control cover and look for the word “Caution.” If it is upside down, replace fan limit.
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.
7.
Remedies:
Possible Causes:
• “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.
• Pull white button out and the blower should stop.
• White button on fan limit control is pushed in.
• 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.
23
Made with FlippingBook - professional solution for displaying marketing and sales documents online