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: 02 Cavalier overheating

You probably get the high quote because of your long list of problems. The overheating is the most serious symptom and is the one you need to look at first. It may be a simple as a leaking hose. The...

Q: Car overheating and heat wont work

The heater not working in some cases may be related to the overheating problem you are also having. This may be due to a faulty heater blower motor or potentially a bad heater core. As you may know, the heater...

Q: Q: My car has a coolant leak

Hello. The most common cause of a random coolant loss on this vehicle is a leaking intake manifold gasket. It commonly starts leaking coolant into the engine, which will be burnt off or will leak externally. I typically do a...

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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...