It’s cold outside. So, why should I worry if my car’s air conditioning works or not?
Well, there’s actually a very good reason.
During the winter, obviously we use our defroster a lot – especially in the morning – to clear the windshield and side windows. Normally, you put it on full blast as you’re warming up the car.
But on today’s vehicles, when you turn it to the defrost setting, the air conditioning does come on to help dehumidify the air before it goes across the heater core.
It’s kind of like your house – when you have the air conditioning running during the summer, condensation develops as the moisture is being pulled out of the air. It’s the same concept when you have your car AC on for the defroster. If you’re putting dry, warm air on the windshield – rather than moist, warm air – it helps keep the windows clear.
The moisture that is removed from the air goes out the drain tube through the evaporator.
Even though we’re talking about this in the winter time, it also comes into effect during the rest of the year when it’s raining or the temperature drops a bit. A car’s air conditioning keeps the windshield clear of the fog compared to clearing the windshield of ice and snow.
Your car AC system helps you drive safer by enabling you to see.
Common problems that can affect the air conditioning for the defroster include being low on freon and the AC compressor not working. There may also be a control problem from an air conditioning module, AC switch or defrost button.
If you’re having an issue with the mode selector for the vent controls, it could have to do with a switch or blendor motor, which controls where the air goes – the windshield, vents or the floor.
Right now is a perfect time to check to make sure everything is working. If not, have it checked out at your local, independent repair shop.
HomeTowne Auto Repair & Tire is an authorized Michelin and BFGoodrich tire dealer located in Woodbridge, Virginia. Automotive repair services are performed on all makes and models, including oil changes, brakes, alignments, inspections, and computer engine diagnostics.