Question about 1996 Mercury Grand Marquis

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Is it normal that new A/C compressor continousely works

Auto technician repot that this new compressor normally continousely work ,not intermittently, like other models,is it normal or not???

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  • Mercury Master
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No, All fixed orifice tube systems (yours) cycle the a/c compressor on and off as needed. At 70 degrees F, it should cycle about 4 times/minute. The hotter it gets, the longer it stays on.
You may need to replace the cycling switch on top of the receiver dryer. Cheap repair.

If the system runs all the time, you will ice up your evaporator.

You could have an a/c clutch with improper air gap. Did they replace just the compressor? Or the compressor and clutch assembly? Have them check air gap and adjust it.

  • A/C Always On
  • Circuitry short/open.
  • Damaged A/C cycling switch.
  • Damaged A/C control.
  • Damaged powertrain control module.
  • GO to Powertrain Control/Emissions Diagnosis Manual.
  • Improper A/C clutch air gap.
  • GO to Section 12-03C

Section 12-03C: Compressor and Clutch — FS-10 1996 Town Car, Crown Victoria, Grand Marquis Workshop Manual
ADJUSTMENTS A/C Clutch Air Gap
  1. Measure air gap between A/C clutch and A/C clutch pulley mating surfaces in three equally spaced locations with a feeler gauge. Record the measurements.
  2. If each of the three measurements taken is not within 0.35-0.85 mm (0.014-0.033 inch), remove the A/C clutch (2884) as outlined in this section.
  3. Remove and measure the A/C clutch hub spacer (19D648). Select the appropriate thickness A/C clutch hub spacer to place the air gap within specified limits.
  4. Install A/C clutch hub spacer and A/C clutch as outlined in this section. Recheck air gap measurement.

Posted on May 25, 2009

  • gerry bissi May 25, 2009

    I provided a lot more information than murpheybanton, including how to adjust the air gap, which I think is your issue. But, you gave him a better rating. What gives???

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  • Master
  • 2,004 Answers

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

Cheers.

rate this.

Posted on May 25, 2009

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