Radiator cooling fan should be working at 100 %
-RADIATOR COOLING FAN
Two fan system
One fan system
-FAN CLUTCH SYSTEM
***CHECK THE FAN OPERATION BEFORE MAKING ANY REPAIR TO THE AC SYSTEM***
The radiator fan(s) should be on any time the A/C is on.
IMPACT OF DEBRIS ON THE AIR CONDITIONING SYSTEM PERFORMANCE
Road debris affect the heat transfer of heat exchangers in your vehicle and the overall capacity of the air conditioning.
Clean all the road debris outside the car
(on the windshield)
(on the condenser coil)
Clean all the debris inside the car
In cabin air conditioning filter
Screen air inlet
IMPACT OF AC COMPRESSOR OPERATION BECAUSE OF SLIPPING DRIVE BELT ON HVAC COMPRESSOR PULLEY
-Check Drive Belt tension
An excessively loose drive belt will negatively impact the air conditioning compressor capacity.
HOW TO KNOW IF MY AC SYSTEM IS PROPERLY VACUUM AND RECHARGED.
Check refrigerant charge with gauges (You need special hvac equipment and EPA certifications)
Check refrigerant charge by sensing A/C lines temperature (Do it yourself)
CHECKING THE A/C SYSTEM BY SENSING THE A/C LINES TEMPERATURE.
-Open the hood to get access to the engine compartment (Be aware of all moving parts and hot components)
-Start the engine up.
-Set the A/C Climate control for Maximum blower speed position.
-Set the A/C Climate control for Maximum cold temperature position.
-Let the A/C system run for 5 -10 minutes.
-On the engine compartment identify the A/C lines.
-The Liquid line should be warm to cool even in a hot day
. (A liquid line cold or hot indicates a problem)
-The Suction Line should be cold
. Heavy frost or excessive moisture condensation on the Suction Line indicates a problem.
. Ambient temperature or too hot Suction Line indicates a problem.
-There should be a Temperature difference (TD) between the Liquid Line and the Suction Line (Check temperature before the Metering Device)
If the temperature of both lines is the same, it indicates a problem in the A/C system:
1-Compressor not pumping.
2-Compressor not turning on.
3-Low on refrigerant.