If the clutch doesn’t engage, the problem could be a blown fuse, an open in the wire to the clutch coil, a bad clutch coil, a poor ground, a low pressure switch lockout, or even a bad engine coolant temperature switch. If only the pulley is turning, but the clutch disc isn’t, there’s a problem somewhere in the system. That means the clutch has properly engaged with the pulley. Both the pulley and the clutch should be spinning. Then look at the front of the compressor clutch.
Turn the air conditioning controls to MAX AC and start the engine. The three components of a car’s air conditioning compressor clutch When the AC is turned on, power flows to the clutch coil, creating an elector-magnet that pulls the clutch plate against the pulley, which drives the compressor shaft. The pulley spins the entire time the engine is running, but the clutch plate is stationary when the AC is off. Older vehicles have a clutch type compressor. When the AC isn’t on, the wobble plate inside the compressor is in the 0° position, so the compressor isn’t compressing any refrigerant. The pulley drives the compressor the entire time the engine is running. Late model vehicles use a clutch-less variable displacement AC compressor. Before you start, know the difference between a clutch type AC compressor and a clutch-less compressor
After reading, go to this post to learn how to diagnose a compressor clutch problem. This is a full explanation of how the system works. If so, try the troubleshooting techniques described here. If you’re here, chances are you’ve tried to recharge your AC system and found a compressor clutch not engaging issue. Repair Topics > Air Conditioning Symptoms… > Compressor clutch not engaging Compressor clutch not engaging Car air conditioner compressor clutch not engaging
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