HEATER TYPE HOT AIR COMING OUT OF VENTS INSTEAD OF COLD AIR FROM AIR CONDITIONING

  • Tiny
  • iforman
  • 2008 Mercury Marquis
  • 40,000 miles

Hot air depending on the temp setting, very hot at 90 degree setting and medium hot as I lower the setting but NO COLD AIR. Blower blows OK. It appears the A/C settings are completely ignored.

Friday, October 14th, 2011 AT 12:21 AM

6 Answers

  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

Is the AC compressor engaging?

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Friday, October 14th, 2011 AT 12:23 AM
  • Tiny
  • iforman
  • Member

I really don't know, how do I check that?

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Friday, October 14th, 2011 AT 12:30 AM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

When you turn the ac on, with the engine running, open the hood and watch the compressor clutch (on front of compressor pulley). You will hear a click and see the center of the clutch spin.

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Friday, October 14th, 2011 AT 1:01 AM
  • Tiny
  • iforman
  • Member

I'll check it out tomorrow and get back to you, thanks

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Friday, October 14th, 2011 AT 1:14 AM
  • Tiny
  • Jacobandnickolas
  • Expert
  • 68,287 posts

I'll look for your response.

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Friday, October 14th, 2011 AT 1:25 AM
  • Tiny
  • iforman
  • Member

Hi, I checked the compressor wheel and when I turn on the a/c the front compressor wheel does start to turn.

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Friday, October 14th, 2011 AT 7:54 PM

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