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International Automotive Technicians Network
Re: A/C system surge/pulsation noise on engagement
Posted to HVAC Forum on 10/8/2026

I agree with everything you're saying and I can assure you that everything is correct. I've done probably a thousand or more a/c jobs in my career. This is very unusual.

Johnsons A/C flush, the same stuff I always use. In a pressurized A/C flush container. B... Login to read more.