Read the car ac gauges.
Adding freon to car ac gauge readings explained.
Components of an hvac gauge.
Freon will need to be added by someone.
Ac pressure gauge readings diagnose ac pressure gauge readings how to diagnose car ac pressure gauge readings.
The gauges readings will depend on the ambient temperature.
To charge the system with a can of freon the yellow middle hose on the gauge must be connected to a freon can.
The table below shows the comparison between temperature and pressure for r134a.
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.
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.
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.
Hvac gauges are a tool built for refrigeration technicians for taking pressure readings and and other tasks.
Restart the vehicle and make sure the air conditioner is on the highest settings.
You want the reading to be as close to 40 psi as possible.
Testing the air conditioning system with a r 134a gauge will help you quickly determine if your air conditioning system is low on freon.
If both gauges read below normal while the engine runs and at maximum ac it means a low refrigerant condition exists.
65 f 18 c 25 35 psi 172 241 kpa.
R 134a temperature pressure chart tabla de temperaturas y lecturas ambient temperature f c temperatura ambiental.
Begin to monitor the gauge by watching for the ac compressor to engage the clutch.
With the a c turned off on a cold day the pressure will be low on a hot day the pressure will be high.
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.
135 155 psi 931 1069 kpa.
Get your a c checked at a local shop or check it yourself.
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.
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.
Look at both gauges.
The only way to know if your system is properly charged is to evacuate it and add new refrigerant with a scale.
With the engine running and ac on and an ambient.
High pressure gauge puerto de servicio del lado de lado de alta presion.
Low pressure gauge puerto de servicio del lado de baja presion.
