How do I Turn my Prius AC compressor?

As stated above, your Prius’s AC compressor may be turned by the serpentine belt that turns all of the engine accessories. Or, it may be turned by an independent belt. If there are two belts, they’ll both be attached at the crank pulley. Inspect the belt to see if it is cracked or shiny.

Why is my Prius AC compressor not working?

The AC compressor pulley is always being turned by either the serpentine belt or a dedicated belt (it’s going to depend on the model year and engine type). It uses a clutch to grab the pulley and cycle coolant through your Prius’s AC system. If this clutch doesn’t grab, the AC compressor will not turn on.

How do I know if my Toyota Prius AC compressor clutch is working?

You can use a jump wire to determine if your Toyota Prius’s AC compressor clutch is activating properly. But, first, you’ll need to locate the compressor relay. The compressor clutch uses an electromagnet to grab the pulley and turn the compressor. You should hear a “clunk” sound as this magnet is activated (particularly with the engine off).

Why is my Toyota Prius AC not blowing cold?

Do it somewhere quiet. If you hear a “thunk” or “clunk” noise after turning the AC on, the compressor is engaging. Something else is the problem. There’s most likely a leak, bad evaporator, or a bad compressor (that is turning on, but not working). If that’s the case, jump to this article: Toyota Prius AC Not Blowing Cold.

How do I replace a failed A/C compressor?

When replacing a failed A/C compressor, it's best to replace the compressor, condenser, receiver/dryer, and sometimes the thermal expansion valve or TXV as well. This is because catastrophic compressor failure can damage the majority of the A/C system.

How do you inspect a car compressor?

Inspect with sufficient oil in the compressor since the insulation resistance of the compressor changes depending on the amount of oil in the compressor. Turn the power switch OFF, and leave the vehicle for a night to cool down the compressor's internal temperature. Do not operate the compressor before inspection.