Question about 2000 Pontiac Montana

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Radiator fans will only come on with a/c turned on

The cooling fans will not come on no matter how hot the van gets we either turn on the a/c or the heat to help lower the temp guage. I have swapped out the relays and the thermostat is less than a year old. I have read that the fans should cycle on at 220 and back of at 205. Please help

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You have a sensor which turns the fans on for high temp.  It is likely defective.  Drop and clean the trans pan and change the filter.  You may get lucky on the trans.  Make sure the fluid level is correct before and after.  There are instructions in your manual

Posted on Nov 27, 2008

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Chevy van overheating n won't blow hot air


Bummer deal! Several things could cause overheating. Each needs checked. Does the radiator fan turn on. Is there a visible leak. Could have a head gasket starting to go. Could be a bad radiator cap. Could be deposit plugging the radiator.

When low on coolant the heater does not get hot coolant. If that's not the problem, could be a bad vent motor control that can't open the heater vent door. Each need checked and eliminated or fixed. Hope this helps. http://www.auto-tune-up-and-repair-options.com/Radiator-cooling-system.html

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Fan comes on when switch ignition on instead of when hot Tazz


If the fan not turning on when car engine getting hot,then car will notice overheating.Click this link below for troubleshooting:---http://technoanswers.blogspot.in/2012/02/car-running-hot.html--------To know how engine cooling system works ,click the link below :----Engine cooling components working?

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

------------------
How does Vehicles Engine cooling system works? http://repairhelpcenter.blogspot.com/2011/11/how-does-vehicles-engine-cooling-system.html
------------How to Replace Engine cooling Fan:-- http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-engine-cooling-fan-on.html
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http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

--------

This will help.

Thanks.

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Ford focus 2006 engine overheating once ac swicth is on..


CHECK TO SEE IF COOLING FAN IS RUNNING.IF NO CHECK COOLING FAN FUSE AND RELAY.THE COOLING FAN NEED TO BE RUNNING WHEN AC ON BECAUSE AIR CONDITIONER PUT A LOAD ON ENGINE.COOLING FAN KEEP RADIATOR AND AC CONDENSOR COOL.FAN NEED TO RUNNING.

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I have a 2003 subaru outback 2.5 have had head gaskets replaced, new raditor, replaced thermostate, heat gauge still shows it getting hot UNLESS I turn on the heater fan, doesn't matter where temp is set...


Terry, what's happening, is when you turn your heater on, no matter what temp you have it set at, the vehicle allows coolant to pass through your heater core, and the blower motor acts as another cooling device for the anti-freeze. The next steps I would take, is to check your fans. Let the vehicle warm up a bit, and look under the hood and see if they are turning on at all. If they are, next, you may need to flush your entire cooling system. First start with the radiator, and if that does not help, you may need to flush the entire system, which flushes water jackets throughout the engine, AND the radiator at the same time. Now, if you are not seeing bubbles, (check under the radiator cap also), I would doubt it is a crack anywhere. Take the first steps I gave you, and see if this fixes the problem. Hope it helped you out.

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1 Answer

2001 town&country had replaced radiator but now fan stop working van is not over heating and heat is good hanve no other problem just fan s not working olease help me to find out waht could be problem


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Nov 25, 2010 | Chrysler Town and Country Cars & Trucks

1 Answer

My 2003 gmc safari cargo van has been trying to overheat when I turn ac on what could it be?


If your gmc safari cargo van overheats when the ac is on, your radiator and cooling system may be clogged and not working at peak efficiency.

Make sure your radiator cooling fan goes on as soon as you turn the a/c on.

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1 Answer

Is the radiator fan the same as the cooling fan?


The cooling fan is used to cool the radiator.
There is a sensor that turns the fan 'on' if the radiator gets too hot. A light comes 'on' to tell you the fan is 'on'.

If the fan ran all night the sensor is bad and the (sorry for the pun) the idiot light is on to tell everyone something is wrong and it needs service.
DON"T run your car with out the fan!

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1 Answer

2000 Plymouth Voyager Overheating


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2000 Chevy Venture Van has been overheating. The temp will spike all the way up and then quickly drop again. Back and forth like that.


Almost sounds like the same symptons as my van. Turns out the guage was not the problem. The van was in fact running hot because the electric radiator fans were not kicking in when the engine was hot. I replaced the relay switches for the fans. There are two of these in the fuse panel under the hood. There has been no problem with overheating since

Jan 19, 2009 | 2000 Chevrolet Venture

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