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: Car is stalling, even after tune up

Hello. I would have the idle air control valve checked out for failure (assuming this was not replaced during the "tuneup") or to see if it is gunked up and sticking - not moving enough or fast enough. If it...

Q: Truck goes into limp mode while driving

Hello. The P0068 diagnostic trouble code is an indication that there may be an issue with the manifold absolute pressure (MAP) sensor/mass airflow (MAF) sensor. The P0016 diagnostic trouble code is an indication that there may be an issue with...

Q: Check engine light. Code P2004 (Air Intake manifold. Runner control stuck open, bank 1.)

As you know this code is related to the intake manifold and may be caused by several potential issues such as the following: Intake Manifold Runner Binding Or Sticking Faulty Manifold flow valve Manifold flow valve harness is open or...

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...
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...
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...