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My Coleman Evcon heating and air unit will not blow air

My Coleman Evcon heating and air unit inside is not wanting to run right. The motor will hum but the fan will not turn. The outside unit turns on just fine but the unit inside will not blow air. What could be the problem?? Please help!

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  • 146 Answers

Bad blower motor. recommend a new blower motor and capacitor.

Posted on May 28, 2010

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Posted on Jan 02, 2017

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3 Answers

Coleman Evcon furnace blower runs w/ no call for heat. Temp is 5+ degrees above thermostat setting. (Programmable tstat)


When you say door are you referring to the front door or the furnace door? If the unit kicks on AND off by itself I would say it's in the tstat or the tstat wire. If it were internal I would think the blower relay or heat contactor/relay were getting stuck AND THE FAN WOULD NOT TURN OFF until you flipped the breaker. Good luck

Mar 21, 2017 | Coleman Heating & Cooling

1 Answer

Outside unit will only run for a short amount of time with A/C before the fan stops turning and starts humming, squealing/screeching and the top of the outside unit gets hot.


The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

Apr 19, 2016 | Heating & Cooling

1 Answer

Sometimes the fan inside comes on but outside unit isn't running


Does your furnace have an adjustable fan limit switch it has to be adjusted. If it has a timer check if it can be adjusted.

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1 Answer

My coleman evcon fan motor does not come on. I put the thermostat to on so the fan would run but it will not come on. The rest of the furnace runs properly.


Did you check to see if you have power or fuse blown? If it is a furnace/ air handler and you are comfortable with electricity. Turn
Power off, remove blower door. Find where thermostat wires come into the control board and remove them. If you can find a jumper wire or aligator clips, hook them between R and G. Put blower
door back on and turn on power,

Fan should come on right away, if it does you might have a thermostat problem. If nothing happens but you can hear it hum
or hear nothing at all. Then more than likely the capacitor is bad and or the motor is bad.

Aug 04, 2010 | Coleman Heating & Cooling

1 Answer

We have a Coleman Evcon BW-305150. Last night we


There should be one right above the burner tray. Look at the wiring diagram (pasted on one of the panels) and follow the wires Usually red orange or yellow) to the switch (may look like a rectangle plate with 2 prongs) and jump the switch with a jumper to test.

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My coleman mah 3 roof top will not blowon fan side


Sounds like you have either a bad fan motor or a bad fan motor capacitor. When you turn the unit on with the fan not working, the compressor (the humming noise) runs and gets real hot real quick resulting in the compressor cutting off ( the nothing after) on it's inside high temp switch. This is what the compressor is designed to do so that when this happens, it does not burn the compressor out. Replace you fan capacitor, give the compressor an hour to cool, then try it. In most cases and if I'm correct, the unit will run just like you want it to. Good luck.
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