Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Low freon in the system, monitored by ac pressure switches or overcharged.Issues with the engine cooling fan operation. Depends on what type of vehicle it is.
What kind of vehicle is this, make, model, engine size?
Need to check the operation of the engine cooling fans first, if they dont run when the ac is on it can cause te high system pressure switch to turn off the ac compressor, that switch is located on the high side line of the ac system. If this system uses an expansion valve which it should it will only use a high side switch on the dryer or high side line
Need to know if the system is low on freon by checking with a ac manifold gauge set. Inspect the system for leaks and recharge and repair if leaks are found. The high side doesnt work that way. you can jump the compressor and see if it stays on and monitor refrigrerant pressures
Unplug the coil connection at the compressor and apply power and ground to the coil.
Hello do you still need help with this concern?