Why does A/C not work when it's hot outside?

Asked by May 14, 2014 at 01:50 PM about the 2010 Ford Escape XLT

Question type: Maintenance & Repair

Not much detail beyond this...  A/C only blows cold air below 78 degrees or so.  Above that, it only blows out hot air.

4 Answers


That is not normal, you may need to get the A/C looked at by an authorized dealer. Mine blows very cold, no matter how hot outside it is.

1 of 1 people found this helpful.

Yeah, your system is low on Freon (R134a). Find the leak, replace the part/seal, evacuate and recharge - good as new. FYI: you should see an air temp of 32 to 40 F at the center register, all other vents closed, engine at 2000 RPM and controls set to MAX AC - High speed. You could just add freon until you get it looked at but I don't recommend fooling with a substance under high pressure that can injure an untrained person so easily. Be sure to check your cooling system for good measure too - they're related to each other.

4 of 4 people found this helpful.

Hi,can anybody gave me a tips regarding this problem, my aircon doesnt work, when i climb the road, a bit hill type road, that the only problem,i dont know what happen.thanks


Year? Make? Model? If you are referring o the AC compressor disengaging or the system going warm when climbing a hill: this may be normal operation because the computer will shut off the AC Compressor in a High Demand situation. Also, In many cases, the AC / Heater controls are vacuum operated and a leak in the system or failure of a check valve can cause this concern.

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