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The AC takes the moisture out of the cabin air and that helps clear the inside of the windshield from moisture faster.

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Q: Why does your ac come on when you turn on the heater on your car?
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Related questions

Why does your blower to your ac and heater fan go on and off?

Why does your ac and heater fan turn off and on


My car fan won't turn on unless the ac is on?

You most likely have a bad a/c - heater controller in the dash......


Why a car AC is cooling when set temperature is higher than actual temperature?

the ac in the car cools, the fact you have set a higher temperature than the ambient tempereature means that the car's heater is working and so is the ac, if you wish to heat up your car, turn the ac off.


Why would your car heater not work Car radiator giving bubbles but they go away when you turn AC on or when radiator fan turns on?

There is only one thing you can do if your Heater in your car is not working. You will have to take it to the dealership and have them look at it.


What does it mean when ever you turn your car heater on it smells like burning rubber and your car wants to die?

Possible that the ac compressor is locking up.


What is the purpose of temperature sensor in car?

so when your using the heater it show how your engine is and if its on red turn on the ac fast or your car will over heat and stuff will melt


My heater will not turn on and my ac will not turn off?

First place to look is the thermostat


Why does car turn off when you turn on the ac?

The ac pump may be seized up.


Why does the low pressure A C line turn white and very cold but the inside of the car does not get cold?

Make sure the heater is not on, sometimes the door in the heater/ac box is not working properly or the valve controlloing the hot water to the heater is not stopping the flow. An ac will not out perform a heater. The last thing it could be is that the evaporator is freezing up, or there is a clog in the line somewhere.


Why does the AC light come on when you want the heater to work?

Some vehicles automatically turn on the a/c when you turn on the defroster. A/C removes humidity from the air and allows the defroster to clear the windows faster.


Why when your car is making a turn and the AC is on would it sound like water is moving around inside?

Heater core leak, or stopped up condenser drain line.


How do you recharge your a Lincoln ac?

turn the car on