AC Cycle Question
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New User
Joined: Sep 2003
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AC Cycle Question
Hi guys,
Hopefully I can get some help. Unfortunately, I dont have a truck... and I've searched other forums, but none seem to be as advanced and full of info as this one. So heres my question.
I have a 91' Mustang GT 5.0, My AC was charged a few months back. Possibly overcharged at that. Recently I noticed my air quit working... so I didnt run it for a few month's. I switched it on MAX the other day and saw that the compressor DID kick in and start cycling, I was happy. It ran cold for about 5 minutes... doing its normal 12-15 second cycle of kicking in. Then it just stopped. The clutch released and never kicked back on. I really dont think it's low on freon because it blows ICE cold.
I talked to the ford dealer and they said it might be the cycle switch. I wanted to get you guys thought's on this. I am fairly seasoned with motors but not too savvy when it comes to AC. So im not sure where to begin troublehsooting it.
Thanks a lot
Ryan
Hopefully I can get some help. Unfortunately, I dont have a truck... and I've searched other forums, but none seem to be as advanced and full of info as this one. So heres my question.
I have a 91' Mustang GT 5.0, My AC was charged a few months back. Possibly overcharged at that. Recently I noticed my air quit working... so I didnt run it for a few month's. I switched it on MAX the other day and saw that the compressor DID kick in and start cycling, I was happy. It ran cold for about 5 minutes... doing its normal 12-15 second cycle of kicking in. Then it just stopped. The clutch released and never kicked back on. I really dont think it's low on freon because it blows ICE cold.
I talked to the ford dealer and they said it might be the cycle switch. I wanted to get you guys thought's on this. I am fairly seasoned with motors but not too savvy when it comes to AC. So im not sure where to begin troublehsooting it.
Thanks a lot
Ryan
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
AC Cycle Question
It could be just a bad cycling switch. They can operate for a while then just quit like that. Id hate to think you went all summer long sweating for a 20.00 switch, but it does happen. Other possibility is a bad clutch, which could work till it gets hot, or a bad relay. Id bypass the cycling switch when it fails with a jumper wire at the connector to see if it starts working again. If it immediately starts to work again 99 percent certainty is that the cycling switch is defective.
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New User
Joined: Sep 2003
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AC Cycle Question
Well, I've tried it about 10 times since it stopped cycling the other day... and it hasnt cut back on since.
Is the cycle switch located on the accumulator? Also, if I try and bypass it, I guess using a paperclip or something... should that go into the female or the male end of the plug??
Thanks
Ryan
Is the cycle switch located on the accumulator? Also, if I try and bypass it, I guess using a paperclip or something... should that go into the female or the male end of the plug??
Thanks
Ryan
Logistics Pro
Joined: Jul 2003
Posts: 3,595
Likes: 52
From: Lawton, Oklahoma
AC Cycle Question
There is only one end to the plug, the cycling switch itself provides the other end. Just unplug it, and with the pigtail connector in hand, jump the two wiring pins in the connector together and see if the clutch engages. It should stay running until you disconnect the wire. I usually just take a piece of 14 GA wire and strip each end to make a jumper wire but a paper clip will suffice. Yes, the cycling switch is usually mounted on the accumulator on the Mustang.
Last edited by HomerWinzlow; Sep 22, 2003 at 12:38 PM.
