How to properly diagnose a faulty a/c compressor clutch coil in your car?
If a voltage of 12 DC volts or greater is present on the clutch coil but the clutch isn’t engaging it doesn’t necessarily mean that the clutch coil is bad. A compressor clutch can also fail from mechanical problems, such as an excessive air gap between the pressure plate and rotor, or oil on either of these components. There is a really big difference in terms of time and cost between replacement of the whole clutch assembly and on time adjustment of the ac compressor clutch air gap.
What is the cause of an ac compressor clutch not engaging?
In many cases the problem with an excessive compressor clutch gap is due to improper service of the ac system, running the compressor for too long with an undercharged system, faulty cycling switch or an incorrect replacement or service the of compressor clutch assembly which causes the hvac compressor to cycle too often. A huge amount of heat is created with this improper cycling and slippage, leading to the premature wear of the pressure plate. If this slippage occurs for a period of time, the surfaces of the pressure plate and rotor will be damaged beyond repair and the entire clutch assembly will need to be replaced.
How to replace my car’s ac compressor clutch coil assembly?
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