Question about 2003 Mitsubishi Lancer

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My ac is not cooling off, I have checked the compressor is working because the clutch is spinning. I tried to service with freon no help. still blowing hot air any recomedations?

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  • Jeff Turcotte
    Jeff Turcotte Oct 13, 2010

    is the evaporator pipe getting cold as it comes out of the firewall into the engine compartment? When you tried to add R-134, did it go in?

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  • 58 Answers

You need to have your A/C evaporator checked for any leakage by a proper A/C technitian and replacement if necessary.

Posted on Oct 13, 2010

  • Anonymous Oct 13, 2010

    You need your A/C be checked by a proper certified A/C technitian. You might have a leak in your evaporator causing all freon you ad to leak.

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1 Answer

No cooling effect from ac


the obvious first, check freon... second, check fuses, and finally check that the clutch engages on the ac compressor when turned on (you should here a click and notice a small, momentary difference in the idling of the truck) you can also visually check the clutch by watching the compressor when someone else turns it on. if the clutch is not working, the inner part of the pulley does not spin.

Feb 09, 2014 | 2004 Chevrolet Silverado 1500 Crew Cab

1 Answer

I have freon, and there are no leaks and had a air compressor put in 2 years ago but my car is blowing hot air only


There are a few things that can cause this. First off, make sure that the compressor is turning on when you turn on the AC switch. With the AC on full blast, look at the engine, locate the compressor and make sure that the center hub (the clutch) is spinning, not just the pulley around it that the belt rides on.

If the clutch is not spinning, or if it cycles on and off repeatedly, then your AC compressor is not functioning properly. This could be due to a failed compressor or to a low level of freon in the system.

If the clutch is spinning, then the next thing you should check is your freon level, get a temperature-dependent basic freon gauge, (like the one I posted in the link at the bottom) hook it up, set the outside air temperature on the gauge and then it will show you the ideal freon pressure level. What most people do not know is that having too much freon in a system will cause it to blow just as warm as an under-filled system. The freon level has to be in the "sweet spot" for it to properly work.

If your freon is at the proper level and your AC clutch is on and functioning then it could possibly be the AC switch in your instrument panel, or one of a couple of different parts in the engine compartment, but 90 percent of the time the problem will be found within the bounds of what I just listed. Good luck!

http://www.autozone.com/autozone/accessories/Quest-R134a-recharge-hose-with-metal-gauge-handle?itemIdentifier=34657

Jul 28, 2011 | Oldsmobile Cutlass Supreme Cars & Trucks

1 Answer

My ac wont get cool.......it blows hot air and(caddy seville 95)


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 HP 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 | 1995 Cadillac Seville

2 Answers

Air condition is not cooling my honday civic lx 96? I bougth a freon's cane and hook it up but the freon doesn't get transfer into the car?what I am missing?


you need to put a pressure gauge on the freon input nozzle and see how much freon is already in your system You are probably getting no cooling because the clutch on the front of the A/C compressor is broken, or the switch on the dash is not opening the vents inside correctly. Putting more freon into an already full system can have unpleasant results. So if when checking the gauge, the freon levels are ok, next, run the car, and look at the front of the A/C compressor.see if the clutch clicks in and out as the A/C is turned on/off. If the clutch free-spins all the time it needs to be replaced, or if its silent completely, the wiring to the A/C needs to be checked. If the clutch is ok, head under the dash ad listen for the vent doors opening and closing as you cycle the A/C on/off. If you can't hear them, a vacuum pipe or electrical connection/A/C switch is to blame.

May 26, 2010 | 2003 Honda Civic

2 Answers

How to restart the AC compressor


Unhook the battery for 1 minute.

Jun 28, 2009 | 1997 Mercedes-Benz C-Class

1 Answer

A/C turns off during operation


I encountered a similar problem not long ago, though it was a freon issue and discovered that it was something totally different when the low port reading was 125psi. Confused at the reading, and inexperienced with AC systems I sought secondary opinions, and disovered a solution to my particular issue. The compressor clutch was not engaging due to a faulty relay, thus the system was not cooling--hence the buildup of pressure on the low port line. Truthfully, there could be a number of things causing your AC to act up, here are some of the things to check first & foremost:

1. AC Compressor Control Relay (defined as "M/G CLT" or Magnetic Clutch Relay) may be failing. This can be located in the electrical box to the right of the battery under the hood.

Turn the car on, set the AC to MAX and let it run for a while. While facing the front of the car, look under the hood on the left side of the engine. Straight down in front you will see the AC Compressor. There is a belt spinning a pulley, and a clutch assembly within that pulley which engages the compressor. Use a flashlight to see if the clutch is engaging. If you find that it cycles on and off, then you could possibly be a bit low on freon..

If you've checked the freon and it's within range, then try swapping the "FOG" relay with the "M/G CLT" relay (DO NOT DO THIS WHILE THE VEHICLE IS RUNNING). After the swap, start the vehicle and set the AC on MAX. Inspect the compressor again to see if the clutch is engaged. If your clutch was not engaging on your prior freon psi check, then check it again while the clutch is engaged and the system is cooling--this will give you the proper reading for your freon levels. If this solves your problem, DO NOT leave the FOG relay in place of the M/G CLT relay. Go to an auto parts store and purchase a new relay--OEM costs about $70.00, standard replacements (which I happen to have part numbers for.. AdvanceAuto: #R6034, or #35874. NAPA: #TEM207703, or ECHAR6034. AutoZone: #MT0610. O'Reilly Auto: #35874) run anywhere from $14.00 to $30.00 depending on where you go, and what quality/warranty you desire.

2. AC Compressor -or- comp clutch may be failing. If the air comes on and cools intermittently and the relay is functioning, then it may be a problem with a slipping belt. Check your tensioner on your serpentine, as well as the belt. Make sure there are no cracks in the belt and that it is tight along its route.

If neither the relay nor the belt are the cause of your problem, then you may possibly want to have your system purged, flushed/cleaned, and recharged... this is the more expensive part of maintaining an AC system.

Hope that solves your problem!

Jun 25, 2009 | 2003 Toyota Matrix

1 Answer

The AC is not cooling and when I check the clutch on the compressor it isn't engaging and turning the compressor.


You must of lost freon and when there is no freon your clutch will not activate.Must check it for pressure in the lines.If there is pressure check pressure switch.Good luck let me know

May 24, 2009 | 1999 GMC Suburban

1 Answer

Car full of freon, air conditioner still not cooling


Yes the system can be full of freon and yet not work, the pressure switch could faulty, the expansion valve too could be faulty, he drier receiver too.
On switching 'on' the AC , is the AC compressor workingor rather does it engage?
The AC compressor clutch too could be not functioning.
I guess you have to go step by step to check first if the AC compressor does rotate on switching 'on' the AC.

May 09, 2009 | 2002 Ford Taurus

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