Q: Air conditioner causing car to overheat

asked by on

My air conditioner causes my engine temperature to go up. When the air is off, the temperature is fine.

A: We need to determine if your vehicle is act...

We need to determine if your vehicle is actually overheating, or if the gage is just reading incorrectly. If your vehicle is overheating; you will no doubt have boil over from the radiator or reservoir. The fact that your gage spikes up so rapidly when A/C is selected leads me to believe that there is an electrical issue somewhere.

Perhaps the coolant temp switch is mistakenly plugged into an A/C pressure switch. You need to find a qualified technician in your area familiar with engine electronics to get to the root cause. YourMechanic has qualified technicians that can help you diagnose your overheating issue.

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・Save up to 30%

Get a quote

What others are asking

Q: Stop fuse keeps blowing

Hello there, when a fuse blows in your 2004 Chevrolet Aveo, it indicates there is an issue with the wiring. Fuses typically blow when there is a short to power or to much power drawn. If you have replaced the...

Q: Air Condition/Heat at the same time

Your 2006 Accord has the ability to mix the air for the driver and passenger sides independently of each other. Each has it's own control motor. I would suspect that the passenger control motor is failing or possibly the switch...

Q: Air from AC not very cold

Hi, I would check the fuses first. If the fuses are good, then I would recharge the air conditioning system. It is very likely that there may be a coolant leak. If the problem does not go away, I would...

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...
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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...