AC problem

Ceased TXV? Leak on the Condensor side? What I need is the absolute pressure values. The low side should be around 0.5mpa whilst the high should be 3mpa (during operation)

 

There is a lot of stuff concerning this issue on the forum. There are some who believe that if not properly filled with the correct refrigerant as well as correct oil that problems will develop down the road. I did not experience your issue but did have the situation where at 104,000 the unit stopped putting out cold air except when first started. The dealership topped off the refrigerant but that did little to fix the issue. I could hear the compressor working hard in that the noise had increased. I wondered about the noise. It is not often the car is running and I am out in front of the car listening for strange noises. So I was not sure. I kept reading everything I could on the forum and decided the best thing to do was take it back to the dealer and have them do the full diagnostic. They came back and said it was the compressor. Not cheap, I considered doing the work myself but then asked Toyota through the service department to see if they could help (we purchased new) They agreed to assist and I had the compressor changed out and that cured the problem. In the process I checked the front fans, and air conditioning amplifier, all were ok. Good luck, it is a fairly complex system.

 

The quick way the mechanics check is by injecting a small amount of dye into the system. You can then see the leak location. Proper tools for ac systems is pretty important but you do need to be licensed.