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Air conditioner

Tiny
MATT TAYLOR
  • MEMBER
  • 2006 FORD FIVE HUNDRED
  • 3.0L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 162,000 MILES
AC blows warm air when stopped.

So it is winter now and no AC running, I feel warm air on my legs when the AC and system is not on, no blower. I read the article on blend door replacement, took mine apart and it is working.

Are there other actuators that might cause warm air to be coming in?
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Wednesday, February 28th, 2018 AT 4:14 PM

6 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening.

Do you mean the blower motor is not working or that you have no cold air from the A/C?

Roy
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Wednesday, February 28th, 2018 AT 5:38 PM
Tiny
MATT TAYLOR
  • MEMBER
  • 3 POSTS
No the blower works, I meant I can feel warm air coming from the under the dash, even when nothing is on. There is cool air when the AC is on, but when I stop at a red light it blows warm air. I had the AC Freon checked last fall and the mechanic said the Freon levels were okay. Recommended a new compressor, since it is winter and I have not been running the air. The other day I felt warm air coming from under the dash.

So my question thinking, are there other blend doors that might be stuck open letting in warm air from the heater part of the system?
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Thursday, March 1st, 2018 AT 4:50 PM
Tiny
ASEMASTER6371
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Good evening.

If the pressures were good, why did he recommend a new compressor? Does not make sense.

You need another opinion. It does sound like low Freon in the system. I would have that checked first.

As far as the modes. There is a mode door actuator that controls the direction of flow.

Roy
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Thursday, March 1st, 2018 AT 5:00 PM
Tiny
MATT TAYLOR
  • MEMBER
  • 3 POSTS
Thanks for the honest reply. I do not know what is good Freon pressures. I removed the blend door a few months back as it was making noises, I took apart a put some Vaseline on the gears, seems to have fixed that issue. I will take to another shop to have the pressures checked again.

Thanks
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Thursday, March 1st, 2018 AT 5:05 PM
Tiny
ASEMASTER6371
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Okay, got a diagram of the mode door actuator. It is under the left side of the dash above the gas pedal toward the center.

Roy
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Thursday, March 1st, 2018 AT 5:06 PM
Tiny
ASEMASTER6371
  • MECHANIC
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I do the same thing. I use light lube grease which does not freeze. It keeps the plastic gears from jumping out of their slots.

Roy
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Thursday, March 1st, 2018 AT 5:08 PM

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