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.

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 1,000 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. Why is my air system blowing out hot air in spurts and why is the temperature gauge nearing hot while in use?

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: Car not starting - 2000 Saturn LS1

Having confirmed spark at the plugs, I would have it checked out for correct [fuel pressure]( next (not just whether there is fuel in the rail), and if the fuel injectors are firing while the engine is being cranked. Check...

Q: 2006 kia spectra, temperature gauge not working

With regard to the temperature gauge, the fault there could be due to the sending unit (which is the temperature sensor), the receiving unit (the dash gauge), the fuse or the circuit wiring. To resolve an issue such as that,...

Q: My car won't shift into high gear after a series of thumping while accelerating hard check engine light blinks then stops later.

Hi there. Since the check engine light is coming on I would usually start by scanning the computer for codes. When the light comes on the computer should store the code to let the technician know what it saw. If...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...