I have a 98 durango and i just finished replacing all the freeze out plugs and though all is good with plugs all of a sudden my a/c pump keeps clicking on for 2 seconds then off.. on.. off... on.. even if its on heat of cool fan or no fan... i took the fuse out to at least stop it from coming on and off.. does anyone have any idea what would cause it?

 

Is the heat setting on defrost, the one that goes up the windshield? If it is, all that it is doing is cycling the A/C compressor as to keep it lubricated while not in use during the winter. If it is running like the A/C is on, maybe you loss of charge switch is faulty. Just a thought-

 

The only settings on your A/C control **** that will not use the A/Cmode is the Vent and Heater (floor) settings. All other settings will use the A/C compressor regardless of temperature control.

 

Hi, I'm new to the forum, but I thought I'd chime in. The A/C will cycle on and off rapidly if the pressure is too high in the system, like say from a clogged expansion valve, or other obstruction. Also, the A/C is set to come on with the defrost because the condenser dehumidifies the air in the car, preventing condensation on the cool glass. Usually it only comes on automatically with the defrost or defrost + floor setting, unless you manually turn it on. Most other modes it should be off.

 

in mine it is off except for defrost and defrost/floor settings, there is a setting on defrost that doesnt run the A/C, and any other position its controled by the toggle switch in the dash