Replaced A/C Compressor, condenser, drier and now the A/C clutch stays engaged after turning it off?

K BOOTHE

MEMBER
2004 BMW Z4
3.0L
6 CYL
2WD
MANUAL
197,000 MILES

When I removed the old compressor, I found that the power wire going to the AC clutch's insulation had melted off. I replaced the above items, vacuumed down and recharged the system. A/C working except that when I turn A/C off on the switch, the A/C Clutch stays engaged and turning.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,640 POSTS

Yep, this happens when HVAC controller goes out. To be sure we should do a CAN scan. You can get a CAN scanner from Amazon for about $30.00.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Here is a scanner link:

https://amzn.to/3o41KcZ

If the scan says it is bad, install a new unit. This car has an internal compressor valve. How can you tell if the compressor is engaged if there is no clutch?