My fathers 95 E300D ac compressor clutch is always engaged. Ac off, econ on/off, ac on doesnt matter, the ac clutch and compressor are always on when the car is running.

We have checked the relay, swapped the ac control behind the battery, changed the ac module/control unit/push button deal in the dash with no difference.

What else might be causing the clutch to stay engaged? I have never seen a clutch fail and stay engaged so I expect it is a electrical issue somewhere.

Also to clarify, we bought this car recently and the ac compressor has always run. We suspect a PO wired the compressor clutch but yet we can't find any signs of tampering.

Help?????

can you spin the clutch hub with your hands when the engine if off and key it out??

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2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

the 95 is cursed with the melting wiring harness... this could be the issue. if you unplug the compressor, does it stay engaged? I've seen clutches weld themselves together before.

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!