Q: Does using heat burn extra fuel?

asked by on

Does using heat burn extra fuel?

My car has 14894 miles.
My car has an automatic transmission.

Hey there. The heater in the car only requires the use of the heater blower to blow hot air out of the heater case. The heat is generated by blowing hot air across the heater core inside the A/C blower heater case.

The only way you would use more fuel is if you use the defroster in the vehicle. The defroster will turn on the A/C compressor so the defroster can direct airflow across the A/C evaporator and heater core so you will have warm dry air blowing onto the inside of the windshield.

If the A/C is not working, then you may get a moisture buildup inside the windshield. The running of the defroster will run the A/C and you will notice the drop in fuel mileage if you leave it on all the time. Once you clear your window then change the control to normal heat out of floor or front vents and the A/C compressor will turn off and an increase in fuel mileage will be seen.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Does using heat burn extra fuel?

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: i put gas treatment fluid in my brake fluid what can i do

Hi there. The best thing to do is have your brake fluid flushed by a professional mechanic. I would highly recommend NOT driving the vehicle until this has been completed.

Q: Receiver stuck on a '95 Toyota T100

When they get stuck and that doesn't work, you've got to go with the old stand-by. Heat it up with the torch until it gets real hot and then you can get it off. There is no other way. No...

Q: Q: Overheating

Hi There, By removing the temperature sensor, you are removing the vehicle's ability to determine when the fans should come on and turn off. When this happens the car will not be able to regulate the temperature properly as it...

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 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...
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...