Skip the auto shop - Our mechanics make house calls

Q: Car runs hot when air conditioning on

asked by on

My car runs hot when the air conditioning is on.

If your car is running hot when your air conditioning system is turned on then there may be a problem with the vehicle’s cooling system. When the air conditioning is turned on, it puts an additional load on the engine, which can cause the engine to overheat if the cooling system is not working efficiently. I would recommend having a professional technician, such as one from YourMechanic, diagnose the vehicle’s overheating issue since prolonged overheating can cause serious permanent damage to the engine.

Was this answer helpful?

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!
  1. Home
  2. Questions
  3. Car runs hot when air conditioning on

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: When driving the car it feels like it's gone into a higher gear.

Hello, thanks for writing in. Is your Check Engine Light illuminated? Your description sounds like your transmission may be in "limp mode" which is usually 2nd gear in many transmissions. It is also possible that the sensation you are getting...

Q: Car overheating and not defrosting properly.

Hi, I have seen this issue quite often on the PT Cruiser. This is typically caused by a failure in the heater core that is located in the dash. This part carries hot coolant into the interior of the car...

Q: My air conditioner blows warm when idle, looses coolant and starts to overheat.

Hi! I have a couple of thoughts that may help you sort out the issues with your Explorer. There may be separate root causes of the issues with the air conditioning system and the cooling system. The first thing...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.