coach81 Report post Posted January 8, 2013 Speaking of the Air Conditioner.......With every car / truck I've owned if you don't turn the fan on.. but leave it on "economy" not "recirculation" mode but turn the setting from cold to hot.. the air that is pushed through into your vehicle will be warm as the vehicle warms up... Is this considered "running the heater" or no??? If you do this, how much does the engine have to work to heat the vehicle??? Quote Share this post Link to post Share on other sites
