You need a gauge which you can pick up at any Auto store and some discount stores. The PSI level goes by the ambient temperature and you can find a chart on the link below. Under diagrams and specs then R-134a System Pressure chart.
You charge the ac system on a vehicle through the low side port. There is alot of DIY (do it yourself ) tools in the market for you to work on your ac system. You can find a lot of helpfull information on www.idqusa.com.
The low pressure (vacuum) side.
The low pressure side of the ac system is the ac hose that runs from the inside of the vehicle to the ac compressor. The high pressure side runs from the ac compressor to the condensor in front of the radiator. Follow the ac hose from the compressor back to the body and you will find the charge fitting. It is smaller in diameter than the high pressure side. You would need a different adapter to hook up to the high side.
Low refrigerant charge?
low refrigerant charge or restriction of airflow
Yes, through the schrader valve.
Low refrigerant charge
charge thru sution line nozzle underneath right front of car turn on ac to low temp charge and u should feel a difference
The low pressure port that is located under the front passenger side of the car in front of the starter. I took me forever to find it.
Most common cause is a low refrigerant charge Could be a blown fuse
where do i find the low side to attach the hose for filling on the ac
Low refrigerant charge