is it correct, i turn on A/C switch in my car when i use heater?

[mamed_msn]

A/C switch : that switch you turn on air conditioner.

 

[ryankneale]

No. Your A/C aids in defrosting but works automatically when you have it in the defrost position.

 

[ryankneale]

No. Your A/C aids in defrosting but works automatically when you have it in the defrost position.