A/C blows hot air going up a hill.

[Chris Abernathy]

I have a 2010 explorer. When I travel up a hill or accelerate my ac starts blowing hot air. When I crest the hill the cool air resumes coming out of the vents. What is causing this problem and what is a fix ! ! !

 

[Lube]

AFAIK, all cars will un-clutch the A/C compressor at full throttle...sounds like maybe a throttle position sensor issue, maybe?

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the A/C & heater section. Check the pressure in the system with a manifold gauge set. It might be low on freon.

 

[essam]

Hi Chris,

once on semi-full throttle the high pressure switch will disengage the AC compressor clutch to avoid high pressure to the system which is a fail-safe mechanism, I'm not aware of any solution for this if it's considered a problem.

you may check the gas pressure in the system at an AC shop.

 

[bdyman9]

Wot

It's due to what's called a wide open throttle circuit in the computer. It turns the compressor off under heavy load,over heating,passing conditions ect. It's meant to not impead performance.

 

[bdyman9]

Thanks for the help