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1994 Mercury Marquis AC won't cool

Tiny
RMBMPD
  • MEMBER
  • 1994 MERCURY MARQUIS
Air Conditioning problem
1994 Mercury Marquis V8 Two Wheel Drive Automatic

The AC of my Grand Marquis stopped cooling. When I checked the refrigerant, the gauge registers as it having sufficient r134A.

The fuse is fine. The unit blows out warm air when on Max or normal AC. The heater and vent work fine.

What could be the cause?
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Saturday, May 9th, 2009 AT 12:50 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
Is the compressor engaging?
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Saturday, May 23rd, 2009 AT 2:48 PM
Tiny
RMBMPD
  • MEMBER
  • 1 POST
Thanks for replying. How can I determine if the compressor is engaging?
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Saturday, May 23rd, 2009 AT 3:41 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
If you watch it with the engine on and the ac on, you will see and hear the clutch on the front of the pulley lock up and spin with the pulley. When it is off, the center part won't spin.
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Saturday, May 23rd, 2009 AT 11:48 PM

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