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A/C Compressor & Clutch for Mitsubishi Eclipse

If you asked anyone about one thing they couldn't live without in their Mitsubishi Eclipse, more than a handful would probably mention the air conditioning. When your compressor clutch seizes, the pulley slips, the bearing catches, or the AC just stops pushing cold air, there are solutions to beat the heat once more. Inventory includes components to repair or replace your compressor clutch for all models of the Mitsubishi Eclipse.

What is the function of the compressor clutch?

This is one of the most important parts of your Eclipse's air conditioning assembly, as it controls the on-off toggling of the compressor, which is what makes the air cold in the first place. A common issue that crops up in all vehicles is the compressor clutch will end up seizing, which causes it to stick in an on or off state. When this happens, the clutch continually applies pressure to the refrigerant or refuses to do so at all. You can tell your clutch is working correctly when the compressor gently clicks or makes a shifting noise behind the dashboard while your A/C is running.

What other accessories are related to the clutch?

Additional parts that are affected by the compressor clutch include:

  • AC Compressor: The compressor pressurizes coolant and circulates the resulting cooled air through the system for expulsion into the cabin.
  • Pulley and Bearing: The puller and bearing coupling conveys the circulation of coolant through the system.
  • Flywheel: The flywheel engine component feeds power to the compressor.
  • Refrigerant (coolant): The refrigerant is a gas that is compressed into a chilled liquid by the compressor. It absorbs heat from the ventilation system to cool the air traveling through it.
  • Evaporator coil: An exchanger brings the coolant together with the warm air to chill it, forming evaporative condensation.
Can A/C parts from other cars be used?

It's not recommended to mix parts between vehicles unless they fit the same wattage and size specifications. You could cause unforeseen complications in the engine since the compressor relies on the flywheel for power, and collisions between moving parts is a distinct possibility.

What can indicate A/C failure?

There are a few symptoms to keep an eye out for when your A/C begins acting up. Some changes to take note of are the following:

  • Compressor Clutch Seizing: Seizing results in a rattling feeling paired with a grinding noise.
  • Pulley Malfunction: The pulley could be slipping, the bearing may be wearing down, or the band could be losing its tread — all typically causing a squealing sound.
  • Coolant Leak: Pressure seals can fail over time, causing the gas to escape, making the air less cold while the A/C runs.