During warm-weather months, a functional air conditioning system and its components are the key to pleasurable driving. Yet, sometimes, one of the essential parts malfunctions and stops working. Let’s face it: no vehicle—even the most reliable Toyota—is perfect. A failed AC system in a Toyota can create a miserable driving experience.
AC systems often fail due to a faulty AC compressor. If you want to ensure a stable flow of cool air through the vents, you need to be aware of these six signs that your Toyota’s AC compressor is malfunctioning.
Strange or Excessive Grinding Noises
When you switch on the air conditioning system and hear something out of the ordinary, the AC compressor is likely the cause of the noise. The compressor is an automotive part that relies on internal bearings and metal components for smooth operation, and when these break or wear out, it often results in all sorts of loud sounds. You’ll need to change out the entire unit when this seems to be the problem.
Leaking Refrigerant Fluid
The internal bearings of the AC compressor are crucial for preventing fluid leakage during refrigerant pressurization. If you notice your vehicle has developed a moisture leak, and the source lies in the compressor body, take this as a sign to replace the bearings immediately. If the part over-compresses the refrigerant and causes seals to burst, the entire AC system will no longer function.
Striking Burning Rubber Smells
The smell of burning rubber is never a good sign. This recognizable aroma indicates that something is awry within the vehicle. If you notice this lingering smell coming from the engine bay after turning the air conditioning system on, the cause is likely a seized AC compressor part or pulley that needs repairing or replacing.
Hot Air Stemming From AC Vents
Hot cabin air is another of the identifiable signs that your Toyota’s AC compressor is malfunctioning. Out of all the common initial symptoms, this cooling issue is the easiest to recognize. A damaged or failed compressor will not be able to regulate the refrigerant air flow of the AC system, and gradually cause an unnaturally high or little to no temperature change.
A Stuck or Inoperable Compressor Clutch
A vehicle’s AC compressor has pulleys that consist of several parts, one of which is the outer clutch. A failed clutch will not engage, meaning the compressor cannot turn or receive engine power when needed. With this issue, you may notice the AC system is stuck in the on position or trapped in the off position.
A Premature Worn or Squealing Auxiliary Drive Belt
A drive belt that cannot properly turn indicates a faulty or misaligned AC compressor pulley. You’re likely to hear a high-pitched squealing sound from the rubber belt or notice the component is excessively worn from the uneven movement of the pulley.
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