A/C not cooling when moving

2006 LINCOLN TOWN CAR
300,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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ABDULLAH ALHAFIZ
  • MEMBER
  • 5 POSTS
My A/C works perfectly when I’m parked. Even at 49c. When I start moving it starts getting warmer. The compressor is still running but the air is little bit warm. It’s acceptable when I’m driving until 50 kmh when I’m driving faster than this it becomes warm and humid. I disabled the ventilation door and there is no air coming from outside the car. I checked if there is a leaking but there was not. And the Freon level was okay.
Please advise.
Aug 2, 2020 at 9:58 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Good afternoon,

What is the high and low side Freon pressure when you run the engine at 1,500 RPM's?

How did you determine the Freon was okay?

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

Did you check the condenser and radiator fins? If there is any dirt or debris in the fins the air flow will not be enough for the condenser to work correctly.

https://www.2carpros.com/articles/how-a-car-air-conditioner-works

Roy
Aug 2, 2020 at 10:50 AM
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ABDULLAH ALHAFIZ
  • MEMBER
  • 5 POSTS
I don’t know high and low pressure.
I only went to mechanic and checked it there and he said it was okay.
Regarding the radiator i changed recently and I cleaned the condenser from outside. So the air flow is perfect.
Aug 2, 2020 at 10:54 AM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
  • 52,796 POSTS
  • ASE Certified Mechanic
Okay, I need those readings to help.

You also have to clean the radiator at the fan and also in between the radiator and the condenser.

Roy
Aug 2, 2020 at 11:04 AM
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