How to Check AC Gas (Refrigerant) Pressure? | Animation | HVAC

Checking the refrigerant pressure in an AC unit is a relatively simple process, but it is important to follow the safety precautions and to have the right tools. Here are the steps involved:

Gather the necessary tools. You will need a refrigerant gauge set, a pair of gloves, and safety glasses.
Locate the refrigerant service ports on the AC unit. These are usually located on the compressor or on the condenser coil.
Attach the gauge set to the service ports. Make sure that the gauges are properly seated and that the hoses are not leaking.
Turn on the AC unit and allow it to run for a few minutes.
Read the pressure readings on the gauges. The high pressure gauge should read between 225 and 250 psi, and the low pressure gauge should read between 65 and 75 psi.
If the pressure readings are outside of the normal range, it may indicate a problem with the refrigerant charge. In this case, you should call a qualified HVAC technician.
Here are some safety precautions to keep in mind when checking refrigerant pressure:

Always wear gloves and safety glasses when working with refrigerant.
Do not open the refrigerant service ports unless the AC unit is turned off.
Do not allow refrigerant to come into contact with your skin or eyes.
If refrigerant does come into contact with your skin or eyes, flush the area with water immediately and seek medical attention.
Dispose of refrigerant properly. Do not release it into the atmosphere.
It is important to note that checking refrigerant pressure is not a substitute for a full AC inspection by a qualified technician. If you are having problems with your AC unit, it is best to call a professional.