Asked by Apr 20, 2015 at 09:17 PM about the 1992 Ford F-150 XL 4WD Extended Cab LB

Question type: Maintenance & Repair

A/C blows cold at idle when i start going it stop blowing high and cold. blows low and
warm.when i slow down or stop it blows cold and high again

2 Answers


sounds like the compressor clutch is slipping at higher engine speed and catches up at lower rpm. Probably need to replace compressor clutch


YOu may have a vacuum canister on you vehicle to maintain vacuum when the vehicle is running at a higher speed. Check for leaks.

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