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Fan won't turn off ,.after gas is turned off.even when cold have to turn off at power point

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This would indicate a bad fan relay switch. I can not really give advice on changing it out untill I know what type of unit and the model. Once you have these please comment me back and I will be more than happy to help you out.

Hope this helps Ya

Posted on Jul 13, 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.

Feb 27, 2015 | Air Conditioners

1 Answer

Heating works fine...The air conditioning compresser out side comes on and the fan works..But the inside fan won't come on to push the cold air??


Good observations-- let's see if we can go a bit deeper now-

Yes-- You have to have the inside air fan working,-- in order to blow the COLD air at the coil-- into the room.
So-- Can you trace the wire back from the motor to a terminal block, or remove the terminal block cover, and measure some voltages?
Is the wire into the motor, reading line voltage (120Volts-- or 240 volts-- what is the plus that the unit is plugged int, supplying?)

No- Voltage-- No Fan!-
If you have voltage-- but no fan turning:
Is the shaft frozen?-- can you spin the blade wit your hand?

How old is the unit?-- and has the fan motor worked recently?

Help me help you get to the next trouble shooting point-
Mack B

Jul 04, 2011 | Air Conditioners

1 Answer

My outside Kelvinator central ac unit will not turn on. I hear a faint humming noise coming from it so it appears that it is getting power but won't turn on. My fan in the house will turn on and...


Its possible that the contactor that closes to start the outdoor unit is not pulling in and passing power. You are hearing the coil humming since it is getting control power. Also first check that breaker for outdoor unit is not tripped

Jun 22, 2011 | Air Conditioners

1 Answer

Once you turn on aircon with fan with high speed, the air blown doesn't get cold even after a while. The fan makes some wierd high pitch sound as if like metal against each other. The fan stops once in a...


Your AC needs a good overhauling as the fan seems struck on the bearings or the blades are rubbing the sides. Also the compressor fails to cool as there can be low gas, low pumping pressure or a blocked condenser.
You need to remove clean the coils and lubricate the fan to be set back. Check the capacitor to the fan and compressor as a low value will reduce the speed and so reduce pumping pressure.

Apr 11, 2011 | Air Conditioners

1 Answer

Fan doesnt work on heat cool ok


Often the fan will cycle on and off on the heat mode. A cold air prevention mode is often built into modern Ac units whereby the indoor fan wont turn on until the internal system pressure is up to a certain point and heat is available to pump into the room. If the system cant come up to pressure or temperature then possibly the system is low on gas. Place your hand on the large pipe leaving the outdoor unit, it should be HOT when the system is on heating mode and running. If not Hot, then it is low on gas.

Feb 24, 2011 | Pace 18HPEWHEC Split System Air...

1 Answer

I have a Rudd Achiever 90 plus Premium Efficiency Model# UGRA09EZAJS Serial# Y5D707F460504955 mfd date 11/2005, It blow a cold air after turn the heat on and set it on position instead of auto, temp set...


When you set the the switch to ON, I'm assuming that is the fan control? You should leave that on AUTO. The furnace will turn the fan on when the heat exchanger reaches a preset temperature. Which will prevent COLD air from coming out of your vents.

Nov 04, 2010 | Ruud UBHC Air Conditioner

1 Answer

My coleman RV AC 8000 series will not run - not even the fan. When I turn it on, I get a hum, and thats all. At one point, I gave the fan a little 'Push" and it ran nice and cold for hours. Once it...


It can be the start capacitor,or the fan itself can be bad,replace the start capacitor,then if this does not help,replace the fan motor,sense you can start the fan by hand,and it runs for hours,it must be the start capacitor.

Jul 27, 2010 | Air Conditioners

2 Answers

The outside fan motor (OFM) will not turn off.


it sounds like your fan connector is on the same side of the contactor where your high voltage enters you should have 3 wires 1 wire for each pole of the contactor and 1 wire off the capacitor does the compressor run all the time too? try turning the power switch off on your indoor air handler / gas furnace if the power goes off the fan goes off then it could be low voltage wiring

Jun 30, 2009 | Ruud UAMB Air Conditioner

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