Automotive Ac System Pressure Chart

Start your ac pressure readings diagnostic by measuring the system s static pressure.

Automotive ac system pressure chart.

The other usual cause of high pressure readings is that the entire ac system may be overcharged which happens either when there is too much refrigerant or too much oil. Attach to the hoses and gauge set to the high and low side ports of your ac system. The ambient temperature is 32 degree. Teo on july 23 2018.

R 134a temperature pressure chart tabla de temperaturas y lecturas. The system should be recovered vacuumed min 20 minutes and charged. A c pro is the easy diy car a c repair that saves time money. When an air conditioning system loses its ability to cool properly it may be necessary to recharge the system with new refrigerant keep reading for a r 134a a c pressure chart and steps on how to recharge the a c system when the system is low on pressure or has been vacuumed out following a repair.

The most ideal pressure readings are around 150 high and 30 low. This could be a bad txv h block or blocked orifice tube depending on your system. The low pressure side is 80psi and the high pressure side is 105psi. If your gauge readings are accurate there seems to be blockage between the low and high side.

For a general reference you can check out this chart of r 134a system pressures. My car ac static pressure is not equal. Remember venting 134a refrigerant into our atmosphere is illegal and bad for our environment. The warmer it is outside the higher the pressure will be.

With the engine off for at least 30 minutes read the low and high pressure. In this case pressure must be released by a certified mechanic. R134a pressure gauge chart this chart details how ambient temperature correlates with the system refrigerant charge pressure and how it affects high and low side psi readings. The following table presents the possible inferences and the actions that can be taken based on the level of pressure registered by the high and low pressure gauges.

The gauges readings will depend on the ambient temperature. With the a c turned off on a cold day the pressure will be low on a hot day the pressure will be high. This simple fix recharges the r 134a freon stop leaks gets your car a c cold again. However it s not always that the system is actually overcharged.

Pressures can vary from car to car based on the system and the pressure in your system will also vary with the ambient temperature. The table below shows the comparison between temperature and pressure for r134a.