Quote:
Originally Posted by RZNT4R
Be wary of any instrument with a specific zone marked on the dial. AC pressures can fluctuate wildly just based on ambiant conditions and a cheap DIY low pressure gauge is not enough.
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This is helpful. I measured it with the cheap gauge at 70F and greater than 40% humidity so 25-38 psi on the low side is the result I’m getting.
I was always told AC doesn’t go bad if the system remains sealed, but since you know your AC, is this true?