Hissing under Dash
96 Town and Country with Rear AC. For the past few months ive had a strange hissing noise coming from what sounds like behind the glove box. It sounds like steam traveling in a tube and is usually followed by warmer air from the AC. I replaced a leaky AC line and recharged the system and didnt hear the noise for several weeks now its coming back.
My question is this. Is it something to do with low pressure thats making the R134a make the hissing noise inside the system, which will tell me that i still have a leak. Or is this something else?
Sometimes i hear the same strange noise from the Rear system as well, at the air exchanger back there.
1996 Chrysler Town and Country LXi 3.8l 115,000
1997 Buick Regal 3.8l 99,588 (totalled
1985 Buick riviera 5.0l 80,000
1972 Lincoln Mark IV 460ci 114,000
1989 Lincoln Town Car Signature 5.0 85,000
2000 Buick LeSabre 3.8l 94,000