A/C switches
1995 LT1 when i bought the car last nov. the a/c didnt' work... I took it in and had a check ran because I could get the compressor to turn on... They tested to find it was 2 lbs low but no leaks per vaccum check... They quoted me some 250 to charge it... Um no thanks.... So I took it home had the idea if I cranked the pressure on the low side I could kick it on... Sure as heck it did. once it kicked on I noticed it wouldn't kick off. I thought because it was low that it kept running to keep pressure up.... when I got to the autoparts store. I shut my car off stood in line for about 30min to get another can of 134a... I went outside to hook it up and I noticed the compressor was off again.. So i connected the other can and the low side spit 134a back at me.... shocked I tried to get the gauge back on when I did it read a pressure of over 100PSI yes this is the lowside..... On the back of the compressor there are switches (relays?) I haven't seen them yet but my parts store told me about them after I told them about my problem..... i believe they called it a cycle switch...
Now that you understand most of problem. While talking to the parts counter they did a search and they came up with about 4 or 5 different relays that plug into the back of the compressor... one of these controals the cycle. I would buy all of them and just replace until it works but there about $20 each, and a pain to get too.... Also after looking at one of them it's not like a fuse you can just look at and know which is bad you actually have to replace it know it's bad...
Now that you understand most of problem. While talking to the parts counter they did a search and they came up with about 4 or 5 different relays that plug into the back of the compressor... one of these controals the cycle. I would buy all of them and just replace until it works but there about $20 each, and a pain to get too.... Also after looking at one of them it's not like a fuse you can just look at and know which is bad you actually have to replace it know it's bad...
TECH Enthusiast
Joined: May 2005
Posts: 669
Likes: 0
From: Charlotte, NC
There is only one pressure switch. It's in the line near the pass side shock tower. 3 wire. Thats the only one. There isn't a switch on teh compressor.
Have a shop charge it. no offence but based on what you said you don't ahve any idea on how the system works and needs to run and it could be very dangerous if you continue to do this. I would honestly recomend a shop at this point. There is no way to tell what you have done to the system without a pro looking at it who knows what they are seeing.
Have a shop charge it. no offence but based on what you said you don't ahve any idea on how the system works and needs to run and it could be very dangerous if you continue to do this. I would honestly recomend a shop at this point. There is no way to tell what you have done to the system without a pro looking at it who knows what they are seeing.
Originally Posted by HBHRacing
There is only one pressure switch. It's in the line near the pass side shock tower. 3 wire. Thats the only one. There isn't a switch on teh compressor.
Have a shop charge it. no offence but based on what you said you don't ahve any idea on how the system works and needs to run and it could be very dangerous if you continue to do this. I would honestly recomend a shop at this point. There is no way to tell what you have done to the system without a pro looking at it who knows what they are seeing.
Have a shop charge it. no offence but based on what you said you don't ahve any idea on how the system works and needs to run and it could be very dangerous if you continue to do this. I would honestly recomend a shop at this point. There is no way to tell what you have done to the system without a pro looking at it who knows what they are seeing.
If they are wrong please help me understand this and why... I know what sensor your speaking of and i'm pretty sure but not 100% that it's a pressure sensor that shuts off if not enough pressure or too much pressure. as it was explain to me that does not run the 15 sec cycle or what ever the timing is.
when they first mention this to me I thought he was on crack and I might still believe that after seeing that quarter size plug. THIS PLUG HAS NO WIRES!!! it just plugs into the back like a fuse... there is only one wire (well 2) that plug into the compressor and thats on the right hand side of the compressor towards the radiator.
Can someone post a pic of the back of the compressor so i dont' have to take mine out to understand????
TECH Enthusiast
Joined: May 2005
Posts: 669
Likes: 0
From: Charlotte, NC
Originally Posted by CONVERTED
I wont' take offense to this... but i've charge several other LT1's and several fords...never had a problem and cooled great..... as for the system... there are relays that plug into the back of condensor as it was explained to me by the parts counter.... they showed me the plug/relay about the size of a quarter..
If they are wrong please help me understand this and why... I know what sensor your speaking of and i'm pretty sure but not 100% that it's a pressure sensor that shuts off if not enough pressure or too much pressure. as it was explain to me that does not run the 15 sec cycle or what ever the timing is.
when they first mention this to me I thought he was on crack and I might still believe that after seeing that quarter size plug. THIS PLUG HAS NO WIRES!!! it just plugs into the back like a fuse... there is only one wire (well 2) that plug into the compressor and thats on the right hand side of the compressor towards the radiator.
Can someone post a pic of the back of the compressor so i dont' have to take mine out to understand????
If they are wrong please help me understand this and why... I know what sensor your speaking of and i'm pretty sure but not 100% that it's a pressure sensor that shuts off if not enough pressure or too much pressure. as it was explain to me that does not run the 15 sec cycle or what ever the timing is.
when they first mention this to me I thought he was on crack and I might still believe that after seeing that quarter size plug. THIS PLUG HAS NO WIRES!!! it just plugs into the back like a fuse... there is only one wire (well 2) that plug into the compressor and thats on the right hand side of the compressor towards the radiator.
Can someone post a pic of the back of the compressor so i dont' have to take mine out to understand????
there IS NO sensor/relay/switch in the compressor on your car. The 3 wire switch in the line by the shock tower is the only switch. It's as simple as that. your chasing down a ghost based on what an idiot at a parts store is telling you. Trust me. All that you will find if you remove your compressor is a whole lot of work for nothing.
Like I said. Take it in and have a shop finish it off and see whats wrong. You have used the wrong terms several times in your post which continues my standing that you don't fully understand the workings of the AC system. FOr this reason I highly recomend that you send this off to someone else. It's just not going to get you very far with people trying to help you here when you can't grasp the concepts that they are telling you. AC is picky. It needs to be 100% right before it will work correctly. Without starting from scratch with no freon in it it's going to be near impossible for us to see whats going on over the internetwithout being able to look at the car ourselves. If I could see pressure readings I could be more help. But for all you know you have it undercharged or overcharged and don't even know it. Both of which will hinder the efforts untill you do know.
Talked to the dealer today. and got figured out.... yeah no relay...
I went over everything face to face with the tech and compunicated just fine.... so i'm sorry if I lost you, anyways he went over about 100 different things to try i'll keep this thread posted.
I went over everything face to face with the tech and compunicated just fine.... so i'm sorry if I lost you, anyways he went over about 100 different things to try i'll keep this thread posted.
Originally Posted by HBHRacing
there IS NO sensor/relay/switch in the compressor on your car. The 3 wire switch in the line by the shock tower is the only switch. It's as simple as that. your chasing down a ghost based on what an idiot at a parts store is telling you. Trust me. All that you will find if you remove your compressor is a whole lot of work for nothing.
Like I said. Take it in and have a shop finish it off and see whats wrong. You have used the wrong terms several times in your post which continues my standing that you don't fully understand the workings of the AC system. FOr this reason I highly recomend that you send this off to someone else. It's just not going to get you very far with people trying to help you here when you can't grasp the concepts that they are telling you. AC is picky. It needs to be 100% right before it will work correctly. Without starting from scratch with no freon in it it's going to be near impossible for us to see whats going on over the internetwithout being able to look at the car ourselves. If I could see pressure readings I could be more help. But for all you know you have it undercharged or overcharged and don't even know it. Both of which will hinder the efforts untill you do know.
Like I said. Take it in and have a shop finish it off and see whats wrong. You have used the wrong terms several times in your post which continues my standing that you don't fully understand the workings of the AC system. FOr this reason I highly recomend that you send this off to someone else. It's just not going to get you very far with people trying to help you here when you can't grasp the concepts that they are telling you. AC is picky. It needs to be 100% right before it will work correctly. Without starting from scratch with no freon in it it's going to be near impossible for us to see whats going on over the internetwithout being able to look at the car ourselves. If I could see pressure readings I could be more help. But for all you know you have it undercharged or overcharged and don't even know it. Both of which will hinder the efforts untill you do know.
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