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Fan cuts on and off repeatedly when heater is on

I have no problems when the ac is on cool, but when it's on heat, the fan cuts on and off repeatedly. This started about 4 days ago. I've changed the thermostat wjth no improvement.

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  • Anonymous Jan 30, 2009

    Fan cuts on and off repeatedly when heater is on problem, and notify you when a new solution is offered.

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Either the circuit board or the relay that controls the fan in heating is dropping the fan out. it probably uses a different blower speed for cooling than for heating.. you'll need a meter to check if it is losing power.

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Posted on Jan 16, 2009

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hi,
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For more help, I suggest you to go through the troubleshooting links mentioned below:-----

Click the link below: ------

How to replace Cooling Fan on Acura Car models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-cooling-fan-on-acura-car.html

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OBD Code P1490 low speed fan relay ckt open-short

http://schematicsdiagram.blogspot.com/2012/11/obd-code-p1490-low-speed-fan-relay-ckt.html

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http://repairhelpcenter.blogspot.com/2011/11/engine-cooling-components-working.html

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How does Vehicles Engine cooling system works?

http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html

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http://schematicsdiagram.blogspot.in/2012/02/hyundai-sonata-cooling-fan-not-working.html

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http://repairhelpcenter.blogspot.com/2011/10/fuel-pump-relay-and-cooling-fan-relay.html

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http://carbeltrouting.blogspot.com/2011/12/fan-belt-routing-diagram-for-2004.html

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http://carbeltrouting.blogspot.in/2012/02/timing-beltdrive-beltserpentine.html

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I have a 2001 intredpid 3.2 that is overheating. The passenger side cooling fan will not cut on. I just changed the fan motor yesterday and I still haven't seen the fan cut on. Since I changed the...


First off, there is a number of reason why u are hearing bubbling noises but first lets address your Fan. I take it that u have a 2 fan setup, when you say " The passenger side cooling fan will not cut in". This fan is associated with the AC, and only comes on when the AC runs. Helps with better air flow thru the condenser which is in front of the rad. Does the AC work?

OK, now for the bubbling noise. First off the noise indicates to me that maybe you still have problems with over heating. Does the fan on the drivers side come on? Where is the Temp gauge at when it does come on? You might have air in the system, which canbe bleed thru a bleeder screw on top of the motor. I found the best way to do this is have the frt of the car elevated abit with the car off when filling the coolant reservoir. Other things associated with over heating, thermostat not opening, or stuck open. Head gasket, possibly exhaust is getting into cooling system, building up pressure which vents when you shut engine off. Hench the sound. Water pump possibly leaking.

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