Noise when vent setting used
Thread Starter
Instructor
Joined: Jan 2017
Posts: 226
Likes: 22
From: Milton Ontario
Noise when vent setting used
I have a 71 BB with A/C and I've noticed that when the climate control ***** are on the vent or A/C setting I hear what sounds like a small blast of air coming from somewhere outside every few seconds. Almost sounds like the pressure relief noise that air brakes make. Is there some kind of vacuum relief valve that makes this noise?
Thread Starter
Instructor
Joined: Jan 2017
Posts: 226
Likes: 22
From: Milton Ontario
So it was happening in the AC position and the noise was the compressor cycling on and off every few seconds. I took it in for service and they topped it up with refrigerant but 2 days later same thing so system must have a leak.
