Automotive Ac System Pressure Chart

Pressures can vary from car to car based on the system and the pressure in your system will also vary with the ambient temperature.

Automotive ac system pressure chart.

This could be a bad txv h block or blocked orifice tube depending on your system. With the engine off for at least 30 minutes read the low and high pressure. The gauges readings will depend on the ambient temperature. A c pro is the easy diy car a c repair that saves time money.

R 134a temperature pressure chart tabla de temperaturas y lecturas. Start your ac pressure readings diagnostic by measuring the system s static pressure. System pressure chart get a quick look at what an average a c system looks like along with the compressor manufacturer and what the specific r 134a requirements are for your car. The low pressure side is 80psi and the high pressure side is 105psi.

The ambient temperature is 32 degree. Remember venting 134a refrigerant into our atmosphere is illegal and bad for our environment. However it s not always that the system is actually overcharged. The warmer it is outside the higher the pressure will be.

In this case pressure must be released by a certified mechanic. With the a c turned off on a cold day the pressure will be low on a hot day the pressure will be high. For a general reference you can check out this chart of r 134a system pressures. 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.

Static pressure is the pressure with the system at rest compressor off for at least 30 mins. If your gauge readings are accurate there seems to be blockage between the low and high side. It can be used for recharging refrigerant or to diagnose an a c system based on pressure readings from your gauges. 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.

This simple fix recharges the r 134a freon stop leaks gets your car a c cold again. Attach to the hoses and gauge set to the high and low side ports of your ac system. The most ideal pressure readings are around 150 high and 30 low. The table below shows the comparison between temperature and pressure for r134a.

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 system should be recovered vacuumed min 20 minutes and charged.