Skip the auto shop - Our mechanics make house calls

Q: Air conditioning is not cooling effectively during the heat of the day

asked by on

During the heat of the day in the Pilbara of Western Australia (38 deg+) the air con is struggling to cool the inside of the vehicle. At the moment the air off temp is 12 deg in the vents and this may vary as to wether the vehicle is stationary or moving. What should the air off temp be when vehicle is at high idle (1500rpm)? The vehicles air con was recently inspected and some refrigerant was removed as they believed that the excess gas was cutting out the compressor. Still the problem persists. Hence my question.

My car has 83000 miles.
My car has an automatic transmission.

A: Depending on the vehicle model and engine y...

Depending on the vehicle model and engine you may have a cooling fan not providing enough air flow across the radiator and condenser. This is most likely the cause of the a/c not blowing cold enough. The temperature should be 45 degF or about 25 degF less than ambient temperature out of the vents with the a/c on max air and the blower on medium speeds with engine running at 1500 rpm with a fan in front of radiator. Since you let some refrigerant out you will need to reclaim and evacuate and recharge the a/c to give it a full charge. If the cooling fan or fan clutch is not working then it will need to be tested and replaced.

Was this answer helpful?
Recommended services
Get a Quote

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Air conditioning, speedometer, and rear wipers stopped working

To answer this fully, I would need more information as to what the original problem was and what repairs were performed. This sounds like a case of a shorted wire somewhere as these systems you listed are normally unrelated. A...

Q: 2004 Ford Ranger cranking, but not starting

A crank, but no start condition can be caused by many things. Depending on how strong or weak the vehicle is cranking, the no-start condition can be caused by a low battery, a problem with the fuel system, or even...

Q: AC only blows hot air

Hello. We will be happy to assist! To diagnose an AC concern, I first suggest checking the refrigerant levels as it is the most vital component to the health of the AC system. Then, a technician should attempt directly switching...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...