How to use an A/C Manifold gauge for R-134a refrigerant and charge.

First step is to learn how to use an AC manifold gauge. Know what pressure readings should be at on the low and high side.
Then you can charge using the yellow line.

[@Nobody-gs1ne]

You forgot to purge the hoses.

[@bwduval904]

My low side is at 94 and. My high side is at 75 can somebody tell me what's going on I know my fans not working properly

[@danjoyce6135]

always purge your hoses or you will introduce non-condensibles into the system. You should be recovering the charge, and vacuuming the system. If you charge as a liquid, by turning the tank up side down, you only charge on the HIGH side. The low port is the suction port and you should only charge as a vapor here or you risk slugging the compressor. Either way you must weigh the charge in or risk overcharging

[@invent5540]

Purge with freon tank upright FIRST to flush out air first before connecting to car then invert freon tank and connect to car... Then open valves. Purge for 2 seconds is good enough...

[@Pack044]

Any reason it won’t go above 55 psi both sides? As in it’s not sensing enough 134 and compressor isn’t on but for some reason it stops charging at 55 and like I said won’t turn on

[@kimhouchhith797]

Put a vacuum on the system using a pump then try charging it. If that doesn't work, check your pressure sensors. It could be sending a wrong signal to the HVAC control module for the compressor clutch engagement.

[@Pack044]

@@kimhouchhith797 come to the conclusion it’s gotta have a big leak

[@issamadam9352]

Put freon by weight

[@onestopviparty]

can you please tell me where is it that you buy 30 pounds of r134a for 100.00 dollars?

[@kimdobranski4137]

I was thinking the same thing

[@dirty3valve97]

Have yall found this 😭anywhere I’ll order it bc we paying 389.99

[@blemurpaul5102]

wow,he put air into the system....

[@audioapex1085]

how

[@coleproctor7995]

I wish it was $100