Automotive Ac System Pressures

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.

Automotive ac system pressures.

It can be used for recharging refrigerant or to diagnose an a c system based on pressure readings from your gauges. What is normal automotive air conditioner pressure. The low side should be near 30 psi at 90 degrees fahrenheit or less. 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.

However it s not always that the system is actually overcharged. You can t accurately diagnose your car s ac by using just the low pressure gauge on a recharge kit because you re only seeing pressure on the suction or low side of the entire system. 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. Ac pressure gauge readings diagnose ac pressure gauge readings how to diagnose car ac pressure gauge readings.

Pressure that is too much lower or higher shows there is a problem. 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 ac system in your car could go through all sorts of problems one typical issue is the unit not blowing cold air which could be punishing in hot weather. Knowing what the pressures are in the air conditioning system in your car can tell you almost all you need to know about how your system is functioning.

There could be several causes leading to this condition including compressor issues low level of refrigerant trouble with the heater or ac controls and others. Remember venting 134a refrigerant into our atmosphere is illegal and bad for our environment. Make sure you are not wasting money replacing wrong parts. In this case pressure must be released by a certified mechanic.

R 134a temperature pressure chart tabla de temperaturas y lecturas. The car ac pressures can tell you everything that you need to know about your ac system. Actual readings will vary according to ambient temperature. Do they move closer together high side gets lower while low side gets higher or do they.

With the gauges connected rev the engine to 2000 rpm and watch what the pressures in the ac system do. Start the engine and turn on the air conditioner.