I'm having a problem with my a/c when i turn it on it blows cold air for a little while then all of sudden it starts blowing regurlar air,not hot or cold but just outside air.my clucth is working fine and i filled it with one bottle and half of 134a freon and the pressure is at 80-85 then it drops to 10.what could be the problem?
This could be the reuslt of a faulty expansion valve .This valve is where high pressure liquid is converted to a low pressure gas inside the evaporator housing.It has a nitrogen charged "power head" that controls the amount of refrigerant through this valve which could be the reason you have un-stable suction pressures.Important to draw a good vacuum on the system after replacement and install the correct amount of refrigerant.
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