97 Plymouth Grand Voyager, the a/c will cycle as usual, and then at some point (minutes or hours after I first start the a/c) it will cycle off and will not cycle back on unless I manually turn it off and then back on. I tried to do some research, and it sounds like a pressure switch is bad. Where are the high and low pressure switches located? Is it something I can test and/or replace? Thanks.
yact: air conditioning pressure switch?
- Thread starter klod
- Start date
Hmm, 132,000 miles and this is the first real hiccup. I'd like to keep her for a while longer. Anyone else?
Ok, say I'm driving with the a/c on, and cold air is blowing out of the vents. At some point I can feel the air start to warm up and it feels/smells humid, like the vent is on but not the compressor. I reach down and hit the button to turn the compressor off, leaving the fan still running, wait a second or two, and turn it back on. I feel the compressor grab and cold air starts blowing again. It doesn't seem to happen in stop and go driving, but on the highway at steady speeds. And sometimes it will work fine for hours, other times I'm turning it on/off/on every five minutes.
OK, it could be two things.
First, an bad A/C relay, turning the switch on and off will reset it.
Second, coolant or a/c fan isn't working and you high side pressure get over the limt and disengages the compressor.
I hope this helps.
First, an bad A/C relay, turning the switch on and off will reset it.
Second, coolant or a/c fan isn't working and you high side pressure get over the limt and disengages the compressor.
I hope this helps.
Where are the high and low pressure switches located? Is it something I can test and/or replace? Thanks.
The low pressure switch is on the expansion valve near the bulkhead and the high pressure switch is on the compressor. The only test I've ever done was to bypass them to see if they were the fault.
It's done this for the last couple of years. In March I had a truck back into the front end. The condenser was replaced, so I know it was purged and re-filled. No difference in this problem, it's still cutting out.
On your car it does. But I would let a professional mechanic look at the system, I still think it's related to my orginal post on your concern.
If you lived near me I would be happy to check out for a small fee.
Evadman
Administrator Emeritus<br>Elite Member
- Feb 18, 2001
- 30,990
- 5
- 81
Originally posted by: Quixfire
On your car it does. But I would let a professional mechanic look at the system, I still think it's related to my orginal post on your concern.
If you lived near me I would be happy to check out for a small fee.
Probably the same fee as mine. A case of Beer
Originally posted by: Quixfire
On your car it does. But I would let a professional mechanic look at the system, I still think it's related to my orginal post on your concern.
If you lived near me I would be happy to check out for a small fee.
I wouldn't mind letting a "professional" mechanic look at it. I just don't know any around here. If it's the relay, is THAT something I could replace myself? Where is it located?
Sorry for the questions, but I don't want to get gouged at a local shop. I just need someone to point me in the right direction. Thanks.
TRENDING THREADS
-
Discussion Zen 5 Speculation (EPYC Turin and Strix Point/Granite Ridge - Ryzen 9000)- Started by DisEnchantment
- Replies: 25K
-
Discussion Intel Meteor, Arrow, Lunar & Panther Lakes Discussion Threads
- Started by Tigerick
- Replies: 21K
-
Discussion Intel current and future Lakes & Rapids thread- Started by TheF34RChannel
- Replies: 23K
-
-
Facebook
Twitter