Question about 1996 Mercury Grand Marquis

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Is it normal that A/C compressor clutch work sometimes andstopped

Is it normal that my new A/C compressor clutch works sometimes and stopped ocasionally and what the mechanism of this action of compressor&the clutch

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It is suppose to cycle on and off, to maintain the temp you set in the car. It's controlled by the thermostat, connected to a capillary tube located in evaporator, sensing the temp of the air being blown thru.....thus turning the electromagnetic clutch on and off.

Posted on May 27, 2009

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If you have auto air the clutch on the compressor will cut on and off as the inside temp of car change.normal.

If the system isn't cooling good the clutch will cycle on and off if it is low on freon.

Posted on May 27, 2009

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1 Answer

I just put new ac clutch in2006 Taurus and is working great but car running sluggish almost stop running when at a light or stop sign why


The original a/c clutch was probably burned up by the compressor locking up. Possible bad compressor.

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If you replaced the compressor unit, normally R-12 or what ever is used, is evacuated and thus they create a vacuum, then recharge the system to the proper level of gas/ pressure. Vehicles have a vacuum controlled shut-off valve to stop or reduce the flow of anti freeze from the engine to the heater core, near the condenser. There is sometimes a pressure control valve or switch to control, when the actual compressor unit clutch engages to start to pump the gas to cool the cabin area of the vehicle.
There are also fuses/ circuit breakers near the left front fender well under the hood, and left driver's side under left side of dash. I am presuming that the clutch assembly on the compressor functions properly engaging/ disengaging, when system is properly "charged."

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2005 Sedona fully charged,compressor does not turn on


Normally you would check for voltage at the relay then the low pressure switch, then the compressor clutch.
With the system charged or the low pressure switch bypassed you should have 12 volts at the clutch and ground. You can also check the clutch with an ohms meter to see if the magnet is open.

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Ac clutch does not work, a new compressor was installed, new relay and fully charged.


is there power to the compressor as well is the clucth adjusted with a little washer in the back of the pully sometimes they fall off when installing and puts the clutch to close causing it to jam but check all fuses as well the wire to compressor sometimes breaks

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I have a 2002 dodge stratus r/t coupe (mitsubishi) with the 3.0L 24valve V6, and auto transmission. Lately the A/C will operate normally sometimes, and sometimes it will not blow cold due to the compressor...


The hvac relay is located in the power distribution box under the hood in position #60. You can swap another 5 terminal relay to test. You did not say what your pressure readings were, but you could have a bit of moisture or a little air trapped in the system causing the intermittent operation. To eliminate this, have the system evacuated with a deep vacuum, then recharged to mfrs. capacity. I hope this helps.

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A/C has stopped and have been told that a/c compressor clutch is not working. Can I replace just the clutch or does the entire assembly need replaced?


It is a rather pain in the **** to repair and replace a faulty compressor clutch. I'd get the price for both at a service center that specializes in a/c repairs and also make sure if it is rebuilt what kind of guarantee or warranty is offered as well

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A/c clutch not working. Is the clutch replaceable


Your clutch will not work if the 'fluid' level is low. This is designed to protect the compressor.
Was your air cold before it stopped?
You can buy a pressure gauge and new coolant at most stores for around $20. Make sure it's the right coolant.
The clutch CAN be changed without replacing the compressor.

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I have a 01 focus and at the ac compressor pulley it rattles, ac doesn't have to be on for it to do this. Ac was still working fine until yesterday stopped blowing cold air. Any idea on what would have...


well if the a/c has quit working .....the compressor probly finally failed....most times when the clutch hub begins to rattle or becomes real loose it has already worn the compressors snout....that cannot be fixed ...you need a new compressor .......

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Is it normal that new A/C compressor continousely works


It is not normal. Consider seeing another auto technician before the car ac gets another thing bad in your lovely vehicle.

Cheers.

rate this.

May 25, 2009 | 1996 Mercury Grand Marquis

1 Answer

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This is probably a clutch problem on the compressor, either buy a new clutch or get a second hand compressor and swap the clutch over.

Jun 27, 2008 | 1999 Volvo V70

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