When the heating is on, the fan uses coolant circulation to warm the vehicle!
Cold weather brings new habits, and one of the most important questions is what to do to warm up the car engine as soon as possible? Standing in a parking lot with the engine running is out of the question. Get going, and one of the tips is to turn off the heating for the first few minutes. Namely, when it is turned on, the fan uses the circulation of the coolant to heat the vehicle (through the so-called heat exchanger or heat exchanger). This lowers the coolant temperature and thus the engine needs more time to warm up.
If you want to warm up the engine faster and reduce fuel consumption, turn off the heating fan for a few minutes. You won’t lose much, because until the engine warms up, cold and lukewarm air is blowing for you anyway.