Question about 1994 Ford Escort

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Air is blowing warm, compressor is not switching on when AC is turned on, I wondering if the compressor is broken or is it not switching on and off because it has no freon?

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Check the freon level first you need to have a shop recharge it if that dont work the check for 12 volts at the low pressure switch if you have power there then jump the wires and see if the a/c runs if it dose get a new switch

Posted on Jul 19, 2009

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1 Answer

AC blows warm air. 07 GMC Envoy 6 cyl. 4wd


You probably replace the wrong switch. I believe the high pressure switch is mounted in the back of the compressor. Pull the plug and jump it. If it works, replace the switch. I don't recommend you leave the jumper in the plug. If it the A/C pressure is to high, you could blow lines and such. Costing you a lot of money.

Jun 24, 2015 | AC Cars & Trucks

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

Jun 12, 2015 | 2007 Ford Taurus

1 Answer

Blows cold when first started and then blowes warm


I would replace the AC compressor cycling switch it may be sticking have seen it a number of times. The switch is located in the receiver dryer on the passenger side of the engine compartment. See picture below.


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If this isn't the problem the AC compressor relay may also cause this, flip a coin.

Sep 13, 2012 | 1999 Ford Taurus

1 Answer

Nissan sentra ac blows warm and cold air


Usually low on freon or a faulty pressure switch.
Could also be a problem with the ac clutch on the compressor.

Jul 10, 2012 | 2007 Nissan Sentra 2.0 SL Sedan

1 Answer

My ac blows warm air


You need to hook up a set of AC pressure gauges to the low side charging port and read the system pressures with the AC compressor turned on and running, it should be around 28-32 PSI. If the compressor press is correct you have some other problem like a broken air temperature control blend door inside the dash air ducting.

Jun 24, 2012 | Cars & Trucks

1 Answer

Air cinditioning wont stay on, it switches to heat and wont shut off


What do you mean when you say it wont shut off? is it blowing hot air or do you just feel a lite flow of hot air even if you have the settings to cold?

If this is the problem that you always feel hot air at low flow and the ac goes to hot air then i would say one of two things, first if you have the selector to cold and you feel hot air then there may be a problem with the blend door, this door move to allow hot or cold air, the door may be broken or just a bad motor that controls it. keep in mind if the ac system shuts down for any reason the air then will be warm, it will be about the same temp as outside and maybe a little hotter.

this problem almost sounds like the ac compressor shuts off and then you are getting the outside air which is hot, there are many reasons for the compressor to shut off, it could be the compressor clutch heating up and disengaging , this would be due to a bad compressor clutch.

another reason is the fans are not working, the best thing to do is when the system starts to blow warm check and see if the compressor is running, start engine and look at the front of compressor, with ac off the front of it will not move, and then with ac on the front will spin, check it out and let me know, if it blows warm air and ac is not working then it may be compressor problem but if you are getting warm air and the compressor is spinning then it may be a door problem.

This is hard to check with out testing the system, so i listed a few things to check and let me know the out come. also the ac blows cold for how long before it gets hot air blowing out of the vents, good day.

May 25, 2012 | 2000 Dodge Grand Caravan

2 Answers

Ac blows warm


was it regassed when you changed the compressor? a/c units can be quite difficult, they have certain pressures inside and the valves will not engage the compressor if its not gassed right. on the pipe running from the condensor to the compressor you should see an outlet/inlet valve, you can use your key or a small screwdriver to depress a valve in it to see if its got pressure, just give it a quick push to see if pressure comes out so you dont reverse the valve inside the system and pop the rubber seal. good way to indicate if theres gas and pressure. its like your tyre if your releasing air out of it if this helps.

Jun 21, 2010 | 2006 Dodge Ram 2500

1 Answer

I think the air compressor is bad in the truck


If your refrigerant level is OK and the truck blows cold air your compressor should be fine, in which case the noise is probably coming from the AC clutch which isn't too expensive or difficult to replace. If it doesn't blow cold air, switch the AC on and watch the compressor. If the clutch engages, but the compressor doesn't turn, the drive belt will squeal loudly and probably start to smoke. In that case it is the compressor which is expensive to replace. Most vehicles have an AC bypass that will temporarily cut out the compressor clutch under heavy load. If you are going uphill with the AC on or accelerating heavily you might notice warm air coming out of the vents for a short period until you let off the gas.

Feb 22, 2009 | Mazda B4000 Cars & Trucks

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