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.

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?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Air conditioning is not cooling effectively during the heat of the day

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: Why Does the Air From My Air Conditioner Smell Bad?

Algae or Mold Growth The source of the smell from your vehicle's heating and air conditioning system is the result of mold and or algae growth around the evaporator and the evaporator drain. When the growth of mold and algae...

Q: AC is not blowing cold and a plastic-like smell when AC is on.

There are different possibilities that could contribute to the plastic smell. The smell could be caused by a coolant leak, an electrical issue, the A/C compressor overheating, or simply an outside smell. Sometimes, plastic bags tend to get stuck...

Q: AC blowing hot air in 2010 Nissan Rogue

Hi. Usually, the cigarette lighter fuse blows because the accessory (such as a cell phone charger) draws too much current. I would check the fuse. According to the wiring diagram, it should be fuse #19, which is rated at 15...

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...