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Whenever i turn the ac on about 20 minutes later it starts to overheat.The fan works and theres antifreeze

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  • Samuel Charles Spriggs Mar 27, 2011

    Have you checked the coolant level in the radiator ?




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Hi Domiguehowar,
The a/c system will add heat to your cooling system when turned on. You need to check the air flow through the condenser. During normal driving dirt and other road debris build up between the condenser and the radiator. If they build up enough,they can ob-struck the air flow. This will usually cause the vehicle to overheat at low speeds or when stopped at a light. Take a look at this and let me know what you find. Also send back the information about your Lincoln like the make,model,year and engine size. Also if you have done any work to it recently. Thanks,Chuck

Posted on Mar 27, 2011


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Why is my 1992 Jeep Cherokee Sport overheating when the AC is on?

Your jeep has an electric fan which should come on whenever the AC is on or if the temp goes over the 1/2 way point. It is fed by a 20 amp fuse in the engine fuse box. If the fuse continuously blows, replace the fan

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How can I tell if the engine cooling fan is functioning properly?

The cooling fan is made to come on when the engine reaches a certain temperature. To give a simple and general test - turn the AC on high - it your AC and fan are both working correctly the fan should come on almost immediately. If not within very few minutes like 5 or 8.
Also at operating temperature the fan will run as well. In the early morning before you start the car open the hood - fill the radiator while the engine is still cold. start the engine and wait about 10 minutes or so. The fan should come on before the engine over heats. This may take up to 20 minutes and the fan is designed to run after the car is shut off IF - the temperature is hot enough.

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I have a 2006 ford explorer. It overheats when I turn on AC! Without ac its fine and never overheats. There are no leaks, smoke.

Hi, dwings.
With your description, there are a few things that you can check.
First, check your antifreeze fluid to make sure that there is enough. Turn on your car and let it run for about 15 minutes, and then check the overflow tank. There should be coolant inside. If there's not, go ahead and add some.
Also, check to make sure that the fans behind the radiator are working.
Lastly, you may have to take your car in to your local (and trusted!) car shop, and have them check your water pump to make sure that it's still functional.
Try these steps. If any of these solve your problem, great! If not, please come back and let us know and I or another expert will think up a few more solutions for you.
Thanks for asking!

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I bought a 2000 lincoln ls about a month ago and after we bought it, it started having an over heating problem. Since then, we put new fan, new t-stat, new coils and valves, new radiator cap, new belts,...

I believe you have a head gasket or cylinder head problem (cracked head or blown head gasket).. If it is the gasket, the intake and cylinder head must be removed and a new gasket installed.. If it is the head itself, in addition to what have just said, you will have to have the head repaired or get a reconditoned or new one. This is a major repair.

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Ok if you do not check the engine loses antifreeze works well when you start or turn on uneven, check if the fan is working you bien.Thanks

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Not good. I saw nothing about the fan being checked?

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no the computers only job is too turn on the fans. check for enough antifreeze check for leaks. these cars are known for leaks. if the water pump is broke internally it will overheat with in minutes, or if the thermostat is stuck it will overheat too.

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Sounds like your fan is not working. Moving provides the airflow rgough the radiator needed for cooling.. Over 35 miles per hour, the fan looses its role in the cooling systemto the forced air caused by your speed. Have your fan function ck'd Good luck.

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My car overheat only when i turn on the ac


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