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A/C blow cold moving but when you stop blows warm

Tiny
MOORELYNN
  • MEMBER
  • 1997 FORD E-SERIES VAN
  • 5.4L
  • V8
  • 2WD
  • MANUAL
  • 900,000 MILES
Have a 1997 e-150 Club Wagon Chateau 5.4L. Replaced the a/c compressor, a/c orifice tube, a/c expansion valve and a/c Receiver Drier. Long as the vehicle is moving blows cold, but when I stop at a red light stop blowing. Rear a/c
Monday, July 1st, 2019 AT 8:19 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,170 POSTS
Welcome to 2CarPros.

Those symptoms sound like the Freon is low. The first thing I suggest, if you haven't already, is to confirm both high and low side pressures. Do that and let me know what you find. Also, let me know the outside temperature when checked.

Here is a link showing AC manifold gauges being used to evacuate and recharge. These are the type of gauges you will need. Also, make sure there is nothing blocking air flow and the fan is working properly. Also I'm attaching a link that discusses and AC not working or working, but weak.

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

Let me know if link one is of any help and what the pressures are when checked.

Take care,
Joe

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Monday, July 1st, 2019 AT 9:17 PM

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