Automotive Ac 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.

Automotive ac system pressures.

The low side should be near 30 psi at 90 degrees fahrenheit or less. 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. What is normal automotive air conditioner pressure. Ac pressure gauge readings diagnose ac pressure gauge readings how to diagnose car ac pressure gauge readings.

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. 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. Actual readings will vary according to ambient temperature. 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. However it s not always that the system is actually overcharged. In this case pressure must be released by a certified mechanic. Ac pressure used to be difficult to measure and require expensive tools but with advances in technology and the help of local auto parts stores it has gotten easier to measure one part of your.

Pressure that is too much lower or higher shows there is a problem. With the gauges connected rev the engine to 2000 rpm and watch what the pressures in the ac system do. Remember venting 134a refrigerant into our atmosphere is illegal and bad for our environment. Make sure you are not wasting money replacing wrong parts.

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. Start the engine and turn on the air conditioner. Do they move closer together high side gets lower while low side gets higher or do they.

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. 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.