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what is your engine temperature at the time? also how far is the throttle applied when climbing mountains?
Sometimes when I hammer the gas pedal in my 07′ F150 it shuts the air off for as long as the gas pedal is floored. I think it’s just to let the truck have as much power as possible. It is an old V6 design after all.
most vehicles are designed to shut off their AC Compressor at full throttle as to reduce load on the AC Compressor and also as to free up power for the engine. So if you are applying enough of your throttle going up hill its possible your AC Compressor is disengaging and as a result your AC goes warm.
it also is possible your engines radiator is getting really warm going up hill and heating up your Condenser to the point it can no longer condense the fluid going through it so it cant be condensed to re evaporate again but in that case your engine would have to be over heating and you aren’t complaining about that so it is less likely. My next question would be is how much throttle are you applying to go up hills?
Note,that my car both fans run slow that normal but when i connect them direct to the batery,run more tronger..much more..
[quote=”Iuserp563″ post=171298]Note,that my car both fans run slow that normal but when i connect them direct to the batery,run more tronger..much more..[/quote]
That sounds like resistance in the power supply to the fans. Check all the connections from the fans to the relays for corrosion and the relays. The contactors on the relays can buildup carbon deposits or “pit” causing a less than ideal current flow path.
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