Q: Overheating with AC on?

asked by on May 20, 2017

When the air conditioner is on, my car overheats when i unplug the thermostat plug the engine with be cool but ac will not come on

My car has 4500000 miles.
My car has a manual transmission.

AC Compressor Replacement $672.08 - $2753.22 Get a Quote
Radiator Replacement $327.11 - $1271.53 Get a Quote
Water Pump Replacement $171.86 - $1141.02 Get a Quote

Hi There, Overheating with the AC on is generally caused by a couple of possibilities. When the AC compressor is beginning to fail, this may incur an increased load on the motor as it works harder than usual to turn a bad compressor. This increased load causes the motor to work harder than it otherwise normally would, resulting in the motor overheating. The other possibility may be a cooling system that is not working efficiently. This may be caused by a clogged radiator, blocked or clogged radiator condenser fins, a water pump that is not pumping correctly or potentially cooling fans that are not working properly.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

What others are asking

How do I use Uconnect voice command to override a prompt?

When you are using Uconnect, you will often be given a list of different prompts to choose from. You can wait until the list is complete to select a prompt, or you can override the prompts so that you don’t...

How do I end a phone call with Uconnect?

To end a phone call through Uconnect, simply press the Uconnect phone button once. This button looks like a telephone, and is located either on the steering wheel or the center console. If you are in multiple phone calls, pressing...

How do I change the temperature unit?

The temperature of the climate control system can be set to either Fahrenheit or Celsius. To do so, press and hold the Mode button. While holding this button, press and hold the Dual button for at least three seconds, at...

How do I connect a USB device to the radio?

Your car’s radio is capable of working with a number of different USB devices, as well as other devices using an auxiliary jack. Here’s how to connect a USB device. Open the bottom section of the center console between...

Camshaft timer is off.

You will want to have the fault codes read out of the engine computer to see where the fault lies. P0011, P0016, and P0017 all have to do with the camshaft actuator. These faults are saying the camshaft position does...

My front left tire screeches every time I turn the steering wheel

Your description could cover a number of things. If it makes the sound when the car is not in motion, you may have a problem with the power steering belt. If the sound only occurs only when the car is...

Clutch burning and smoking on 2013 Mini Cooper Countryman

Hello. Thanks for writing in about your 2013 Mini Cooper Countryman. It may be the clutch failing once more causing your condition, but it could also be a sticking brake caliper causing your brakes to overheat and smoke. Brake...

I have a front end squeak on my 2012 Sportage. It is a "rubber" sounding squeak. It was suggested this may be a bushing. It squeak

Suspension bushings are designed to do a few things. They help mount and isolate components like control arms, sway bars, and engine/suspension cradles. They serve a double function to isolate the body and interior from road noises. Having suspension components...

My 2009 Kia Rio needs new ignition/coils. There is a huge difference in internet pricing vs. buying locally. Any ideas why?

I cannot claim to know the quality of every coil on the online or local market. I can tell you that some of the online coils are subpar and will not last long and even have been known to short...

Related articles

A Buyer’s Guide to the 2012 Infiniti EX
If If you’re in search of sport meets practicality, the EX may just be your perfect match. With the sedan-like driving of its G37 sibling combined with utility functionality and plenty of power under the hood, this is one SUV...
A Buyer's Guide to the 2012 Mercedes-Benz GLK
If If you’re in the market for a compact SUV, it’s tough to think of a better option than the 2012 Mercedes-Benz GLK. In case the car manufacturer’s name doesn’t carry enough weight to convince you, consider some of the...
A Buyer's Guide to the 2012 Mercedes-Benz GL350 BlueTec
If If you love a diesel engine in your SUV, but still want to ride around in luxury, your perfect vehicle may very well be the 2012 Mercedes-Benz GL350 BlueTec. Key Features The most important feature worth noting is...