Folks, my ac was not cooling so took it to a non-volvo repair shop up in the woods where we were camping. Now it cools really nice, but I've noticed that my compressor won't shut off. One of the other campers had a psi gauge so we hooked it up to the low pressure in valve and reading was: 40 down to 30 and up to 40 and down to 30 and so on (with ac at full blast), never stopping (though we only ran it 5 minutes afraid to jeopardize the comp).
Should the compressor run continuously? Is it normal? It is safe to run the aircon? using R134a. volvo 850 1996