I recently replaced my a/c condensor after two years with it being broken. I also replaced the dryer. Now it seems the expansion valve is bad. The system works for a short time, but then builds up high side pressure to almost 500 PSI! This shuts off the compressor, but when the pressure drops to about 250psi, it comes on again and the pressure jumps to 500psi again. (The cooling fan is working). It would seem the expansion valve is stuck. Has anyone had any experience replacing one of these valves? I looks to me like I might have to take the dash apart and get to it from inside (not fun). Is this how I will have to get to it to replace it?
