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Q: ac clutch

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Zero pressure low side would that prevent ac comp from engaging

A: Yes. The A/C system will not let the clutch...

Yes. The A/C system will not let the clutch engage unless there is enough pressure in the system to engage the cycling pressure switch. If you want to have this looked at, a certified technician, such as one from YourMechanic to diagnose your AC system and let you know what should be done.

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