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Q: Ac does not stay cool when on.

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My AC will be cold at the beginning of a commute and then blow hot air. The Toyota dealership says that I need a new ac relay and clutch assembly. Is that diagnosis worthy of a second opinion? Will a new ac clutch solve the problem or should the compressor be replaced as well?

My car has 199300 miles.
My car has an automatic transmission.

A: Sometimes the A/C compressor clutch will no...

Sometimes the A/C compressor clutch will not engage when it gets hot due to the clutch coil going bad and losing the ability to engage the clutch. I do recommend a complete compressor replacement with the relay.

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