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2001 cooling fan runs only with heater on

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Old 10 Nov 2012, 10:26 am
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Default 2001 cooling fan runs only with heater on

I just replaced radiator ..thermostat..and car overheated still..i checked fan and it only comes on with heater/defroster.... and when I turn heater off goes off.... is it supposed to do that..the cooling fan ?????...any ideas... could it be the ETC? ..relay???... thanks..Bill
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Old 10 Nov 2012, 10:50 am
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Default Re: 2001 cooling fan runs only with heater on

Check to see if both speeds on the fan are working.

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Old 10 Nov 2012, 12:10 pm
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Default Re: 2001 cooling fan runs only with heater on

Yes, the fan should come on when your in the defrost mode as the compressor is activated and whenever that happen the fan comes on. It should also come on with the A/C as , like above, the compressor is activated. 90% of the time, overheating problems are because the fan has burnt out on one speed or the other.

How to test my radiator fan?
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Old 10 Nov 2012, 12:13 pm
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Default Re: 2001 cooling fan runs only with heater on

busted's right. the reason it comes on with the defrost is the air confitioner is on in defrost mode. and when the air conditioner's on, one speed of the radiator fan is always on. when you do decide to replace the radiator fan, get a dorman. you can find them on rockauto for cheap and they come with a lifetime warranty.

edit: and once again i'm late to the party.
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cooling fan..relays..etc

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