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New air conditioning pump and clutch. Filled with freon. No leaks. Still not working

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  • 254 Answers

Has any one checked to make sure you are getting a signal to the compressor from the climate control.

Posted on Sep 30, 2010

  • Fred Larsen
    Fred Larsen Sep 30, 2010

    No I haven't. How would I do that ???? Thx so much !!

  • john lucas Sep 30, 2010

    have someone start the car and then turn on the a/c, see if you are getting power at the the wire on the compressor

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1 Answer

Why is my Air conditioning compressor cycling on and off?


Likely, you've lost your freon due to a leak. If the leak is slow, you can add a leak sealant and more freon yourself. If it's a major leak, that will work for a few days, and then all leak out.

Sep 11, 2014 | Cars & Trucks

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Air conditioning blowing hot air accompanied by clicking noise while accelerating


sounds like the clutch in the pully is going bad if the clutch goes out it could lock ur motor up or just lock up and shred ur serpintine belt

Jun 17, 2012 | 1995 Lincoln Mark VIII

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I turned on my air conditioning today for the first time since last fall... it was not blowing cold air. It was working fine the last time i used it 3 months ago. Could it be a fuse problem?.. or maybe...


While the engine is running as you turn on the A/C , the compressor will latch on now as you will find the engine faulting in RPM as it comes on. Now if this is so the compressor, the solenoid clutch is good and the fault can be only loss of gas in the system. If not the compressor pumping pressure needs a check. Also if gas has leaked the system needs a test for leaks.

Feb 25, 2011 | 1999 Mercury Sable

1 Answer

How to install a new air conditioning compressor


There is danger working with high pressure freon. Make sure to wear eye protection and gloves.

The first problem is that you have to release the old freon.
You can rent equipment for this, or give the freon to a shop that can capture it.

Then you have to disconnect the belt, hoses, wire, and hold down bolts.
If the new pump does not come with a clutch/pulley, then you would have to switch from the old one, but AC clutches tend to be somewhat difficult to remove or require a special tool depending. That are all different.

Read the instructions with the new compressor as to how to install the oil that should come with it.

They reverse the order things were taken off.
Evacuate the system to remove air and moisture with a rented vacuum pump.
Install freon with a hose from the can to the thicker, low pressure, valve, with the engine running and AC on.

But how do you know you need a compressor?
You could just have a leak and are low on freon, which you could tell by bubbles in the sight glass.
Have you put a set of gauges on and seen too little difference between the high and low side?
Are you sure the clutch is working and pulley center spinning?

Jul 29, 2010 | 2005 Ford Escape

1 Answer

Air conditioning not working


Below is a guide to troubleshoot and check system function. This can be done by most folks.

Look at the front of the ac compressor and have someone turn on the ac from inside the car. The front of the pulley(clutch) will spin when turned on.

If it does not spin, the low pressure switch (LPS) is not satisfied. Meaning there is not enough freon in the system to operate the system. Means low freon capicity because of a leak.

The LPS can be jumpered to cause the compressor to run (clutch to engaged) which will draw the freon in the system.

The LPS is usually a two wire sensor on the suction of the compressor. (between evaporator and compressor) Unplug the sensor and install a jumper, this will engage the clutch. Connect a new can of freon
and fill to system capacity.

The capacity of the ac system will be on a label under the hood, do not overfill. Probably about 2 lbs. Local parts stores (Auto Zone and Advance) will have freon with stop leak. This may help the leak. They also make a freon with a UV dye. I always add a single can with dye so that if stop leak does not work I can find the leak in the future.

The system should be filled until suction pressure is about 30 to 38 psi..

Remember the flow for the a/c system is :
1. From the compressor a high pressure (HP) gas goes to the condenser in front of the radiator.
2. From the condenser a HP2_bing.gif liquid goes to an expansion device (orifice tube or expansion valve)
3. From expansion device the low pressure gas enters the firewall to the evaporator.
4. From evaporator the low pressure liquid/gas mixture goes through the dryer2_bing.gif back to the compressor suction.

May 29, 2010 | 2006 Chevrolet Trailblazer

2 Answers

I have a 2007 Ford Sports Trac I only had it for about 3 yrs the air condition in it is blowing hot air what could be it problem


I see your vehicle is a 2007. You may still have WARRANTY depending on service date and mileage. It may be low on Freon. Look under the hood when the engine is running and observe if the Compressor clutch is engaging.

You should hear some clicks and the front part of the compressor beyond the belt should be turning with the engine. If the compressor clutch is not turning you need to test the pressure and if low add Freon.

There are 2 pressure sensors, a low and a high and the ideal pressure is midway between them. This usually is the total amount recommended per the car refill decal sticker. The fill point is either on the oblong black tank or close to it on a hose.

You need to check for leaks. It is a closed system. There is an opening that let out the old Freon. Some of the Freon cans have a leak tracer. Some have a sealer. If you only have to add Freon every 3 years its not so bad. But it could leak the new Freon in 3 days. You just don't know till you try.

There are Freon cans with the fill hose already on them. You may be able to get a loaner set of Manifold gauges from Autozone or Oreillys for a deposit. They also have the Vacuum pumps to condition the system. Good Luck with your repair.

May 26, 2010 | 2007 Ford Explorer Sport Trac

3 Answers

Air condition warm air. put in coolant freon but still warm air. water pump replaced. still the same.


If it has climate control, the blended air door module behind the glovebox maybe the problem. It is stuck on the hot side.

May 01, 2010 | 1999 Chevrolet Blazer

3 Answers

Air conditioning


If there is no r-12 or freon in the system it wont come on. Try jumping the pressure switch. It's a 2 wire plug somewhere one the AC lines. Just pull it off and jump the wire end with another wire.If the clutch engages you need freon or R-12.

Jul 25, 2009 | 1996 Chevrolet Corsica

1 Answer

Air Conditioniong not working


U may be low in Freon gas.
When Freon is low there's low pressure switch that will prevent A/C compressor clutch from engaging to protect it from failure.
So, first check Freon pressure & any leaks form lines & hoses fittings.
Even if the fan is working, that doesn’t indicate proper compressor OP'S.
Look at the compressor front side you'll see the clutch stationary while the AFT pulley moving.

Then put air-condition compressor switch to ON (Engage),
You should see the clutch engage & start rotate,
If NOT, this is very clear indication u r low in Freon.

Regards;
MAR

Jun 03, 2009 | 2003 Dodge Caravan

1 Answer

AirFlow stopped working on E39 1998


  1. check your fan belt, if your fan belt is in the normal position and no problem.
  2. check your compressor and also check the clutch, it is locate right in front of the compressor, when you turn on your air conidition, the clutch should be turn with the fan belt. If it is not, that means your compressor had problem.
  3. check fuse.
  4. check the freon small flow window see if the lique bubbling too much, if it is means you need fill up R-12 freon.
  5. you probably can not do it yourself, in case if you need freon and your compressor is completely empety, you need a special tool to **** the air out first and than fill up freon.
  6. if your air condition is leaking,and you have to fill up a can of special check leaking freon with red colour first, until you find the leaking parts, fix it then you can fill up freon

Jul 02, 2008 | 2008 BMW 528i Sedan

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