Restart the vehicle and make sure the air conditioner is on the highest settings.
Adding freon to car ac gauge readings explained.
Tasks include vacuuming testing adding refrigerant and recovery.
Testing the air conditioning system with a r 134a gauge will help you quickly determine if your air conditioning system is low on freon.
Look at both gauges.
Low pressure gauge puerto de servicio del lado de baja presion.
R 134a temperature pressure chart tabla de temperaturas y lecturas ambient temperature f c temperatura ambiental.
Hvac gauges are a tool built for refrigeration technicians for taking pressure readings and and other tasks.
With the engine running and ac on and an ambient.
Freon will need to be added by someone.
The table below shows the comparison between temperature and pressure for r134a.
Once the compressor is engaged if the low side pressure is under 40 psi it is verified that the ac system is undercharged.
Reading the gauge correctly ensures you can accurately identify if the freon is low and is the cause of the air conditioning system not cooling properly.
If both gauges read below normal while the engine runs and at maximum ac it means a low refrigerant condition exists.
You want the reading to be as close to 40 psi as possible.
In other words if your system is low on charge you can t use your gauge set to add refrigerant to get to factory specified fill capacity.
The gauges readings will depend on the ambient temperature.
Adding freon to car ac gauge readings explained april 17 2009 7 29 am dennisb auto tool sales air conditioning diy how to auto repair.
65 f 18 c 25 35 psi 172 241 kpa.
Ac pressure gauge readings diagnose ac pressure gauge readings how to diagnose car ac pressure gauge readings.
Begin to monitor the gauge by watching for the ac compressor to engage the clutch.
The hose end has a twisting puncture valve on it that connects securely to the freon can.
The only way to know if your system is properly charged is to evacuate it and add new refrigerant with a scale.
Get your a c checked at a local shop or check it yourself.
Ac compressor pressure readings their meaning many of us come to a conclusion that if the vehicle s ac fails to blow crisp cool air the cause is a malfunctioning ac compressor.
135 155 psi 931 1069 kpa.
Read the car ac gauges.
This may not turn out to be true all the time as the ac could have failed due to a fault in some other component.
High pressure gauge puerto de servicio del lado de lado de alta presion.
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.
A set will have high pressure and low pressure sides along with on off valves that a technician can use to perform a variety of operations.
