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Air condition blows warm air - 2004 Mercury Mountaineer

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The A/C system has a pressure switch will keep the A/C from running if the freon is low. It prevents damage to the A/C compressor from low freon.
My bet is you'll need to recharge the freon in the A/C system.

Posted on Apr 15, 2009

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Posted on Jan 02, 2017

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MobyMech
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SOURCE: Air Conditioning - blows warm

Hi

If the fuses are all ok and you can hear the aircon clutch clicking when you attempt to switch it on, then I think it may be time for a re-gas! You could do it yourself with a can of gas from an autofactors, but you wouldn't get the pressure right, and, there would still be old gas in there.

If you took it to a garage, however, they would **** out all the old gas, and then hold the vacuum in there for a while to check for any leaks. Then they would refill to the exact pressure with fresh new gas.

Regards

Geordie

Posted on Jun 09, 2008

  • 2 Answers

SOURCE: air conditioning blowing warm air

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Posted on Jul 17, 2008

  • 54 Answers

SOURCE: air conditioning not working on driver side

sounds like one of the mixing doors on the drivers side is stuck on the heater side. or the vacuum hose on the mixing door is off of not creating enough vacuum because of a crack in it or possibly coming off

Posted on May 27, 2009

  • 3 Answers

SOURCE: Sometimes air conditioning will blow

There is a pressure sensor welded into the pipe work for the aircon with two wires coming out of it.
Unplug this and bridge the wires together when the car is running with the air con on.
If it is a faulty pressure switch you will hear the clutch on the compressor cut in and out when you touch the wires together..If this works buy a new switch..but you will have to have the car regassed.
Cheers

Posted on Jun 10, 2009

emissionwiz
  • 80637 Answers

SOURCE: air conditioning

This is most often caused by a defective air temperature blend door motor, this is whhat controls the temp of the air coming out the dash register vents, the actuator is deep in the dash, u must remove the entire dash assembly to replace the part.

Posted on Aug 03, 2009

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1 Answer

Air conditioning blowing warm air.


first of all why did you charge the system it never needs to be recharged unless you have a leak in it that being said when you turn on the ac do you hear the compressor clutch kick in and if so do you see condensation on the accumulator and does it feel cold? yes/no if yes then the vacuum door inside the car is not opening thus giving you warm air========if no the refrigerant leaked out again because of a leak ///// or the cycling switch is bad///// or there is still not enough refrigerant in the system to get the switch to turn on the compressor//// or your compressor is n/g

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The AC compressor automatically engages when you have your car in the defrost setting regardless of what the temperature setting is, it removes moisture from the air that's coming out to keep your windows from fogging up.

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I have a 1999 323i BMW. The AC doesnt blow cold (on cool days it blows cool temperature but not common A/C Cold Air, Hot Days it blows Warm/Hot Air). The heater blows warm air but definitely not common...


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Hi,
Please check the links given bellow for detailed view to your query as to why you car AC blowing hot air…
http://www.cartechhome.com/2008/07/your-car-air-conditioning-system-is.html

http://www.zimbio.com/Car+Problem+Diagnosis/articles/44/car+air+conditioning+sometime+blows+warm+air

Let us know if you want something more else please accept the suggestion.

Thank You for contacting Fixya.com

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Look inside the lid of the fuse box to see which fuse may apply to the AC circuits or the blower and check to see if they are blow. the metal link between the two posts that plug in. If the link is missing you need to replace the fuse with one of the same rating. Make sure you know where you took the fuse out from and put it back in the same slot if its good. Check all the main fuses if possible to see if any have blown and replace if they have.

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