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


Sent from my iPhone using Tapatalk Pro

__________________
2011 E70 • N55 (me)
2012 E70 • N63 (wife)