Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
I've heard of cars turning off the a/c compressor on hard acceleration but my V8 Limited seems to do it even on very mild acceleration which is very annoying in the heat wave we've had lately, as I can feel warmer not dehumidified air coming in.
1) the R134 is low which when revving the motor is causing a low pressure condition which turns off the compressor clutch.
2) the orifice is clogged which when the compressor spins faster is causing an extreme high pressure situation which will also turn off your compressor clutch.
There are pressure sensors on the high and low side of the compressor these will turn off the compressor when there is too much or too little pressure. This is a safety feature to save your compressor from burning up, and/or your lines from blowing.
Another, less dramatic, possibility is that you have a vacuum leak or your vacuum reservoir is full of condensate. The vacuum reservoir holds the vacuum to keep the vacuum operated vent switches from changing position when the car is under acceleration.
Does the pitch of the blower motor change or the volume of air coming through the vents?
FWIW there's no high pressure cut out switches on the orifice systems, a high pressure relief valve yes.
