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Fan will not run when ac comes on

Fan comes on when furnace runs but will not come on for the ac

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  • Coleman Master
  • 1,363 Answers

Fan relay bad.

Posted on Aug 10, 2015

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

SOURCE: fan won't run, and buzzing sound

Motor's shot. New motor and capacitor should fix your problem

Posted on Jun 12, 2008

ngafm
  • 166 Answers

SOURCE: coleman mobile home electric furnace

Peace,




It seems you need hands on servicethis time !
ngafm
Bless You,
Please leave me a rating before you sign off!
Thank You

Posted on Sep 07, 2008

  • 56 Answers

SOURCE: furnace runs on heat, air conditioner does not

If you have a Gas furnace in the Attic then the answer is yes. The outside condenser will not run if in fact you have a gas furnace.

Posted on Feb 12, 2009

hvac1
  • 338 Answers

SOURCE: ac unit clicks outside but nothing engages fan or

Have you check the outside breaker? If its ok then you got a problem in your electrical system inside the unit probably the contactor is not engaging this is where the 24 volts from the thermostat calls for the 240 volts to run the condenser fan and compressor. Be careful checking this out because of the high voltage.

Posted on Jul 09, 2010

Testimonial: "thank you for your help it was the dual capasitor that was gone fixed for $30 "

SOURCE: My coleman evcon fan motor does not come on. I put

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.

Posted on Aug 04, 2010

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RV. when furnace is turned on , fan on rooftop AC unit runs continually


i would say its the relay board or communication cabl between stat and board.

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Furnace will not run when hooked up to electricity


Go to your thermostat and access the fan mode. Change the fan mode to Automatic, AU. This will stop the AC fan from blowing when the furnace is turned on. If the fan mode is on Hi or Lo and the furnace is turned on it will turn on the AC blower. Bad design...

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Multiple speed fans are always wired to run on "HI" for A/C and a lower speed for heat. If there are more than 3 wires on the fan motor, its probably a multiple speed.

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1 Answer

Coleman furnace problems


I take you mean there is a fan coming on that blows AC air thru the vents and is the same fan used to blow the heat ? If that is the case is the fan coming on when the heat comes on ? If not then that is why you are not getting the heat.
That can be from a temp sensor not working or a control board or a contactor
First see if the fan even comes on or if the same fan is used for both AC and heat

Oct 13, 2013 | Heating & Cooling

1 Answer

When I turn the furnace on the ac comes on also.


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If you have both heat and ac running that means that the Yellow , AC and the White heat circuits are both being energized with the Red 24 volt hot leg that enters the tstat on the R terminal, note the Auto fan switch between Yellow and Green if Normally closed that is the Auto setting and high speed fan comes on for the Cool mode via the fan relay,
while the Heat speed is low speed and controlled not by the fan relay but the temperature or time delay, you need to determine what speed you have running now, low or high? if you flip the fan switch to ON and it speeds up then it was on low, if it makes no difference you have high sped running already.

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I have an goodman model # gsc130241ae ac unit outside it will not come on, no hum, fan doesn't run thermostat control is good swaped out with downstairs unit. Gas heat unit is in the attic, I don't use...


Does the blower indoors run and move air? if not it would mean that you don't have power to the furnace.
The 24 volt transformer in the furnace is used to power the thermostat and the control circuit on the A/C unit outdoors. Or you could have blown a fuse on the computer board in the furnace.
If this has helped please rate me, and If you need more help, give me some more info.
Thanks,
Paul

Apr 02, 2010 | Goodman CLQ36AR49 Air Conditioner

1 Answer

Miller furnace model M3RL080 BW, code flashes open limit switch or external load on W, I bought a new limit switch, the furnace runs for 5-10 minutes then the flame goes out, the blower keeps running and...


Check your furnace filter any Limit fault code usually relates to airflow...Not enough...causes the furnace to run too hot and shut off....the furnace can be too big for your house if its new...the ductwork can be too small , also make sure your return air vents are clean and unobstructed . Your furnace can be running too long a cycle ....also if you have central air conditioning the coil for the AC in the Furnace can be dirty...restricting airflow...if all this seems ok you can usually increase the fan speed or try tunning the fan in the "On" position on your thermostat this will promote better circulation

Oct 25, 2009 | Heating & Cooling

1 Answer

AC running but no air is coming in


hi,
Check your furnace fan. The air conditioner unit can be running but the air circulation is usually done with the fan on the furnace. If you have a fan switch on the thermostat, check to see if it is in the auto position. If it has the settings on/auto/off, you can switch it to the on position and see if you get any air movement then. If not, you could have a broken belt.

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2 Answers

Fan will come on for heat(auto), but not for AC or set to ON


You have a blower relay in the furnace that's probably bad. In the heat mode the blower is on a temperature relay, in cooling mode the blower has to come on immediately so there is another relay for cooling. The green wire on the thermostat feeds that relay, so if you go to the furnace and shut the power off and find the green wire from the thermostat that feeds that relay and replace it, being careful to mark all the wires before removing them, also the relay terminals have numbers for identification.

Apr 07, 2009 | Heating & Cooling

3 Answers

I have an coleman evcon furnace when i turn a/c on the outside unit will run but the inside wont run


put the just the fan on turn off the ac and the heat and just fan on make sure the blower motor works cause thats really the only thing you utilize from the furnace in the summer and let me know
then if so does your heat work fine

May 30, 2008 | Heating & Cooling

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