A/C clutch not engaging

Tiny
BIGDADDYDRUMMOND
  • MEMBER
  • 1999 CHRYSLER CONCORDE
  • 3.6L
  • 2WD
  • AUTOMATIC
  • 80,000 MILES
Car was blowing cold air with no leaks, however it was making a rough sound. The clutch had a slight wobble.

Replaced the compressor and clutch. Then recharged the system and checked again for leaks. (No leaks found)


But now the clutch will not engage. If I jump the clutch it will engage. I checked the rely and it is also okay.


Any thoughts? It is hot in mid-Missouri!
Sunday, September 2nd, 2018 AT 12:55 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,098 POSTS
Hi and thanks for using 2CarPros.com.

If the clutch is getting power and is not engaging, it most likely is due to a pressure issue. When you recharged it, did you use gauges? If so, can you tell me both the high and low side readings as well as the outside temps when checked?

Here is a link that shows an AC manifold system being used:

https://www.2carpros.com/articles/re-charge-an-air-conditioner-system

https://www.2carpros.com/articles/replace-air-conditioner-compressor

Let me know. I will watch for your reply.

Take care,
Joe
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Sunday, September 2nd, 2018 AT 9:19 PM
Tiny
BIGDADDYDRUMMOND
  • MEMBER
  • 2 POSTS
Thanks Joe,

I took the car to Jiffy Lube to have them vacume out, charge and check for leaks.
Do not know what their gauges read. However, they told me it all checked out except the clutch was not engaging unless you jumped it. As far as outside temperatures it was around ninety degrees while Jiffy Lube was servicing this vehicle.
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Monday, September 3rd, 2018 AT 9:03 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,098 POSTS
Welcome back.

How was the relay checked? Did you replace it with a known good one? I attached a picture of the relay's location to make sure you got the right one. Also, here is a link that shows how to check a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If the compressor engaged prior, something must be disconnected or the pressure is still an issue. Have you checked the pressure switch? The switch is located on the discharge line near the condenser. If that is bad, you will not get power to the clutch. Also, is it possible to get the pressure readings from the shop?

Let me know.

Take care,
Joe
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Monday, September 3rd, 2018 AT 6:51 PM

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