What is the correct operating pressures for R134a refrigerant in a window unit air conditioner?



Answer:
Suction pressure approx 35 psig

Discharge pressure varies between 150 and 175 psig.

Sorry, I can't begin to agree with deo.
I believe it is 4 to 6 psi. Each unit is rated differently though. Check the manufactures website. You never want to fill your unit by yourself. contact a professional. I have seen these things blow before from overfilling. Be care full.

Good Luck

Deo

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