Skip the auto shop - Our mechanics make house calls

Q: Why is my air system blowing out hot air in spurts and why is the temperature gauge nearing hot while in use?

asked by on

My service light comes on and stays on. When the cool air system is in use it sometimes blows out hot air. Also the temperature gauge nears the hot zone when the cool air system is in use. It hasn't reached the hot zone yet but it has come pretty close. I haven't used the air cooling system since Monday and the temperature gauge has stayed at normal levels. I had some coolant added on last Thursday and when I checked it on Monday there was none in the the reservoir at all.
My car has an automatic transmission.

A: This can be caused for a variety of reasons...

This can be caused for a variety of reasons such as a malfunctioning thermostat, a radiator not flowing properly, a faulty coolant temp sensor or AC refrigerant not properly being supplied to the AC compressor. Your car's AC system puts a heavy strain on your car's engine when it runs as it requires a lot of power to run. When the AC compressor comes on it puts additional strain on the motor that may be already struggling to stay cool as a result of any of the issues named above. I would recommend having an expert from YourMechanic come to your home to diagnose and repair.

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!

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: Service Engine Soon Light and P1441 Code, even after replacing purge solenoid

Although some codes require a certain number of drive cycles without problems to reset the Check Engine Light, it sounds like there is still fuel vapor flow from the EVAP system into the engine when there should not be. It's...

Q: Not running gauges

Wow, there is a lot to do here! For the temperature gauge - check the sensor for temperature appropriate resistance, proper wiring and ground connections to the gauge. Yes, speed sensitive wipers were available on this model. As for...

Q: A loud 'pop' occurred, and car will not drive foreword or back. Did my axle break? 2012 Dodge Journey

Hello - this scenario seems to me to be a failure of a CV joint the axle, or the transmission itself. Turning and accelerating puts a great load on CV joints. If this is no longer a warranty-covered item, I...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...