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Intrtherm electric furnace fan weak to start turning

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Check to see if the capacitor for the fan motor is good, if good, probably a bad or weak fan motor.

Posted on Nov 11, 2008

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Home furnace comfortmaker blowing cold air


Home owner's manual? Troubleshooting section. Gas or electric?
If gas, pilot light may be out, or other gas controls. Are you sure you have gas supply? Do you have other Gas appliances so you can check? Furnace needs power for controls, fan and thermostat. Are you sure you have electric power to the furnace? Does the thermostat have a fan switch? If so turn it on and see if the fan turns on. If it does not turn on you may have a circut breaker poped. or some other reason power to the furnace is not working.

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We have a Coleman Electric Furnace Serial # AOL6042086, Model # AHP36C3XH21A and the fan runs constantly, will not shut off. We have replaced the thermostat and just replaced the control board. We h


I wish I was a furnace expert but I will give a push in the right direction. When a gas/electric fan runs it has two speeds. When you turn on the FAN ON switch it should run at the slower speed. If it doesn't turn on or turn off again when you turn it back you have a wiring problem or a thermostat problem. Make sure the thermostat is compatible with your unit and wired properly (on both ends). The other time the fan runs is "in session" when heat or cooling is applied to the system. It should run until the system finishes the cycle then a bit more (30 seconds or 1 minute) to blow the treated air completely through the ducts. If it doesn't stop then you may have a bad fan time delay or relay. Check parts for your model and various appliance repair site online.

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Shut off the electric to your furnace.

the reason that the line is frozen is because of one two things:
First there is enough air passing over the A coil on your furnace.
Could be dirty filters - closed vents- furnace fan will not run/ stops and starts (bad motor).
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see this causes and fix it. God bless you
If the furnace won't run, check the electrical service panel for a blown fuse or tripped breaker. Also make sure the power switch on or near the furnace is turned on. Check the unit for a reset button and try it. Some units have a built-in breaker or fuse panel.
If there is not enough heat, raise the thermostat setting five degrees to see if it turns the unit on. If the unit still does not generate enough heat, check the comfort controls . Clean or replace a dirty filter, clean the blower assembly (see the Forced-Air Distribution Fix-It Guide), and make sure that all registers are open and not blocked.
If the furnace turns on and off repeatedly (cycles), clean or replace the filter; and clean the blower assembly (see Forced-Air Distribution Fix-It Guide).
If the furnace is noisy, make sure access panels are mounted and fastened securely; spray squeaking belts with fan-belt dressing and replace worn or damaged belts; adjust the blower belt; lubricate motor and blower oil ports.
If the element does not heat, refer to the Heating Element Fix-It Guide for guidance.

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Fan on furnace moving slowing, Air set low and AC will not come on


Hello, you either have a bad capacitor or weak motor. Replace the capacitor first since itnis inexpensive, if it does not help the motor will need to be replaced. With a new motor the capacitor neds to be changed anyway so start with the capacitor.

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I have a goodman gsc13 ac unit about 4 year old. When the temp gets around 90 or above outside the fan on the unit starts but the compressor does not. I had service check it out but that day they were...


It sounds like the unit may be over charged. Make sure the outside coils are clean and you have plenty of airflow coming out of the top of the outside unit. What could be happening is, when the temps get higher outside, so do the pressures in the system. The compressor has a thermal overload protection that will kick the compressor off if it gets to hot, which if the compressor is over charged, it will work twice as hard, over heat and shut off. You would need a technician to come out and get the refrigerant charge back to normal. Another thing that could be happening is a weak or faulty capacitor, which is a small round or oval metal object, found in the electrical compartment on the unit. This are fairly simple to change out if your comfortable with electric. I've also had to put what's called a hard start kit on compressors with the same problem, new and old. The hard start basically gives it that extra boost of power to get it up and going. I would start with the refrigerant charge and go from there. The electrical "humming" sound that you hear unless you turn the breaker to the furnace off, is the contactor on the outside unit having a call for cooling. The 24 volts come from the furnace, to the outside unit, and pulls the contactor in to power the unit with the 220 volts supplied. It is normal and you don't have to worry about that at all. I hope some of this helps and good luck!

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If this is whats your hearing then the fan should definitely be running.

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