Quote:
Originally Posted by andrewwynn
After pulling a vacuum for 30 minutes on a huge volume AC system it refused to engage the compressor so I could refill. I couldn't find the low pressure switch so I just pulled the compressor power and used a 12v drill battery to kick on the compressor.
This particular car had a rear seat evaporator and took a huge amount of R134a (like 7 cans)
I was sure the low pressure sensor just didn't close at the initial can pressure and once I got some in it would work and I could plug the compressor power back into the car.
Oops the low pressure sensor was defective "open". I wasn't about to waste 7 cans of freon so now that car's low pressure sensor is a paper clip.
Appropriate warnings given to the owner about regularly testing the refrigerant and the car that lives in Phoenix Az is still kicking out amazingly cold air 3 years later.
Hoping your solution is more clever than a paperclip and can't wait to hear what it is
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Its a bit more elaborate than a paper clip
The problem with mine is the stupid computer is turning off the a/c. There is nothing wrong with it and it will work 5 minutes or so at a time blowing snowballs out the vents.
I can see the computer actually commanding the compressor off with all of the data showing perfect for it to be running.
Since this is my toy/offroad x5 Im not going to spend a bunch on it chasing this and I refuse to own a vehicle that doesn't have killer a/c
Its an Alabama thing. It gets HOT here with high humidity normally.
Anyways I wired up a complete replacement for the compressor control. It works but I need to make it neat and factory looking before I post details.
I used to create classic car aftermarket a/c systems back in the day so I have done a few from scratch
Its easier to go from scratch than modifying whats there to be honest on some vehicles.
The x5 isn't that bad just different than the norm.