Question about 1994 Ford Ranger Supercab

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Ac compressor wont kick on when running air Full of refrigerate to! jumper wire to compressor and ran! What is it Ac relay or wiring?

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  • Ford Master
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It could be the fuse, climate control, switch, or relay.
If you check at the switch, that will also tell you if the fuse might be bad.
Then if you check at the relay, that will tell you if the climate control is bad.

Posted on Sep 02, 2010

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I have a 1996 jeep that I am having ac problems with.


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How do I get an AC compressor to start if the refrigerant level is very low?


Jump the relay w a paper clip or a stand of wire. Are u sure your Freon is low. there are other reasons the compressor wont engage. Too much Freon can cause damage too!

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When I remove the a/c relay and jumper the connection my a/c compressor clutch kicks in. When I removed this jumper the compressor will not engage. Is there a sensor or a switch located that controls this....


May have a bad low pressure/cycling switch. Its a two wire switch and normally found on the dryer/accumulator. You can unplug that wire and jumper it. If the clutch kicks on then either the system is too low on refrigerant to activate the switch or the switch is bad.
That switch can be replaced without loss of refrigerant because there is (or supposed to be) a shrader valve in the dryer.

Sep 05, 2011 | 2000 Buick LeSabre

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I have a 2001 Ford Mustang V6, the ac is blowing warm air. We checked the refrigerant and it is full. The ac compressor will kick on for a few seconds and then kick off. Why is the compressor not staying...


it's either low (in spite of your readings) or your a/c clutch is not working correctly or you have too big an air gap in the clutch.
First, just disconnect the 2 pin connector from the a/c pressure cycling swithc and jumper the 2 pins with a wire to force the clutch to stay engaged. See if it blows cold then, and stays engaged. You can run this way for about 15 minutes before you have to pull the plug.
report reulsts.

please don't forget to rate.

Sep 01, 2011 | 2001 Ford Mustang

1 Answer

I have a 1999 Ford Expedition, Eddie Bauer. The ac compressor clutch will not kick in when useing the climate control. The system is fully charege. I ran power directly to the comperssor and the clutch...


Check the high and low pressure switches, either switch can cause the compressor not to run. Look for the switches in the high and low side lines. Hope this helps, let me know.

Sep 22, 2010 | 1999 Ford Expedition

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My a/c is blowing out hot air and the compresser wont kick on


CHECK THE COMPRESSOR FUSE AND RELAY.IF BOTH GOOD.PROBLEM COULD BE LOW REFRIGERANT LEVEL OR FAULTY AC COMPRESSOR CLUTCH COIL OR DAMAGE LOOSE WIRE TO CLUTCH COIL.FAULTY LOW PRESSURE SENSOR.

Jul 19, 2010 | 2004 Hyundai Santa Fe

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Ac not blowing cold, check main relays, has r12, jumpered and clutch kicks in. checked all fuses and relays swapped horn and ac OK... she has the push button ac controls.... thinking its something with...


there is a pressure switch on the ac drier that is the big silver can looking thing by the dash under the hood... if this goes bad the ac compressor will not kick on and the fans will not run when the ac is turned on... if the fans are not running at the same time of the ac compressor it will not blow cool..

Jun 12, 2010 | 1992 Buick LeSabre

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1986 chevy S10 has no power (12v) at fuse box on the fuse for ac clutch. checked both sides of fuse to ground 00v. ac/heater fuse 12v both sides (fan) works fine


hello, check all fuses, and relays, make sure wires to ac is not broke or has been pinched, sometimes you can run hot wire from battery, to compressor, touch hot side of plug in on comp wire see if it will kick on, if so sounds like a short, if compressor dont kick on with hot wire run to it, tap the out side of comp clutch and see if it kicks on, these compressors will not kick on any way if they are low on freon, once freon is full it should work.

Apr 08, 2010 | 1986 Chevrolet S-10 Blazer

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Air Conditioning


If you have no power (12v) to the power wire at the A/C compressor clutch and have jumpered all of the switches then you need to check for power coming out of the A/C switch on the dash. Also there might be a pressure switch on the back of the compressor that you can jumper also. You can also check A/C compressor relay in the under hood fuse/relay box. There might be a fuse in the under hood fuse/relay box for the A/C too. Hope this helps.

Apr 23, 2009 | 1992 GMC Sierra K1500

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