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#Car compressor repair how to

Bring your engine up to operating temperature.Match the numbers in parentheses below to the numbers in the diagram above to help you identify components and lines in your actual AC system. Keep your hands away from moving components and hot spots like engine surfaces and the exhaust manifold. These checks require you to touch hoses and components with the AC system running.

#Car compressor repair how to

Your repair manual can tell you how to check for power or voltage to the clutch.

If the compressor clutch is not engaged, the clutch may be bad, there could be an electrical problem in the circuit, or the system could have developed unusually low pressure, potentially because of a leak.

A hot clutch is a sign of a slipping clutch.

Also, a worn, slipping clutch can reduce cooling efficiency.

If the system is barely cooling and the compressor clutch is engaged and working, it's possible your system is low on refrigerant.

The compressor clutch should be engaged (center of compressor pulley is rotating).

Set the transmission to Park (automatic) or Neutral (manual).

Accumulation of black dust around the clutch plate may indicate belt slippage.

If necessary, adjust or replace the belt. On a serpentine belt, check the belt tensioner pulley mark.Check a belt for signs of worn edges, tears, and splits.A loose or oily belt will slip, overheat and cause the belt to harden and crack, and lead to bearing damage from heat as well. An over-tightened belt can lead to an accessory or accessory's pulley and bearing fault. The belt should not be too tight or loose.

Often, an AC performance issue can be tracked down to a simple and common problem you may check for yourself.