Question about 1995 Lincoln Town Car

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A/c kepp cutting off but it is not low on freon

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Is the fan on the radiator running when AC is on

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2006 f150 larit a/c works good and periodicallythe compressor cuts out mabey for 15 sec or 30 min


Well, it can be several things. There are high and low pressure cut-off switches. The A/C freon pressure is directly linked to outside air (under hood) temperatures. So if you are at the extreme in either direction, the pressure switches may cut-off.

This is not to eliminate that a pressure switch can be bad. They can usually be replaced without losing Freon. On the other hand, if the Freon system was not sealed, moisture may be icing up and blocking the lines. This can be really bad if the ice forms in the compressor.

As part of a A/C repair a vacuum pump is attached to the Freon lines before refilling. The vacuum pump is run for some time until a vacuum is created and this will draw all moisture out. This will eliminate ice. Then you add the correct compressor oil and quantity and put in the correct amount of Freon. The best amount is usually the makers recommended fill. Maximum cooling happens when the compressor runs the longest and is a balance between the high and low cut-out points.

Aug 21, 2017 | Ford F-150 Cars & Trucks

1 Answer

Switch interruptor


If we are talking about a pressure switch, it usually is the low pressure cut-off switch. Before messing with this switch, verify what your Freon pressure is.
If the pressure is low, the low pressure switch may be fine and you need to add Freon and find out why the Freon escaped.
If you have high pressure, there is a second switch which cuts power to the compressor. Too much Freon will activate this switch.
Tip: You have both a high and low pressure switch. The proper amount of Freon will center the pressure and keep the compressor running more consistently.
Either pressure switch unscrews from the fitting and with a minimum of pressure can be removed from the lines and replaced. The housing should have shapes for wrenches.

May 12, 2013 | 1997 Ford Ranger SuperCab

1 Answer

My ac is blowing hot air. I've checked the gas and it's full. The compressor seems to cut on and off about every 10-15 sec. Do I need a new compressor or do I have some sort of fault switch? Any...


Hello, You need to check how much Low end pressure you have. The Low pressure cutoff switch will disconnect the compressor if the pressure is too low. The high end pressure switch will do the same thing for extreme pressure.

Sometimes the Low pressure switch will get weak and cut off the system too early. Just change this switch which will come out with only a slight puff of Freon being lost. You can jump the connector with a U shaped wire and bypass the Low pressure cutoff switch. If the compressor works better and does not cut out, it can still be low on Freon or have a bad Low pressure switch.

However, if the compressor cuts out a Second time with the Low pressure switch bypassed, the system is probably overcharged and the HIGH pressure switch is cutting off the compressor. You need to purge some Freon out of the system if High pressure is indicated.

Where it gets tricky is the Compressor will compress both Freon and Atmospheric air. Your efficency drops when the Freon is displaced by Atmospheric air. You will need to find the leak in the system which is allowing Freon to leak and outside air to enter the system. You will get a pressure reading with any gas in the lines.

There are Leak detectors and sealers for the system. I hope you just have a bad low pressure switch which is the easiest solution.

Jun 25, 2011 | Ford F-150 Cars & Trucks

1 Answer

Ac compressor goes off and on


You either have a faulty Low Pressure Cut-Off Switch, or you are low on Freon. Have you freon checked, if the freon level is fine replace the Low Pressure Cut-Off Switch.

Mar 27, 2011 | 2001 Mazda Tribute

1 Answer

Air compressor cuts on & off when the car is running, air conditioner is not getting cold?


More they likely, low on freon, will need to do a leak test, to fine out where the leak is at, the reason the a/c compr, shut off, is the low pressure switch cut it off, when low on freon, that way the compr, wont get damage, or you could just keep recharging the a/c system.

Sep 17, 2010 | 2000 Jeep Grand Cherokee

1 Answer

Checked fuses, but compressor clutch does not engage.


Possible it is out of freon. Some cars have low pressure cut off switch that cuts off compressor when freon is low.
Hope this help

Aug 26, 2010 | 2001 Volkswagen Beetle

1 Answer

The clutch on the ac compressor of my '96 Jeep grand cherokee engages for about 5-10 seconds then disengages for another 5-10 secs. Any idea on what causes this?


Have your freon pressure checked out, more then likely low on freon, low pressure switch will cut a/c compr off, when not enough freon pressure, or it will damage the compr.

Jun 30, 2010 | Cars & Trucks

1 Answer

Compressor not engaging except only few seconds


Check your a/c freon pressure, sound like its low, when recharging have them check for leaks freon don't wast has to have a leak, the reason the a/c compr. cut off is because it has a low pressure switch, so when low on freon it will cut compr. off, so it don't damage it.

May 28, 2010 | 2002 Dodge Durango

1 Answer

(8 Bravda old. air condion inoperative Freon


how do you know freon is ok it sounds like it is low and the low pressure switch is cutting compressor off and back on

Mar 24, 2010 | 1998 Oldsmobile Bravada

1 Answer

AC does not work, clutch will not engage


Most likely low or out of freon.There is a low pressure cut-out switch that open's when low on freon to prevent damage to compressor.

Aug 04, 2009 | 1994 GMC Sierra

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