Skip the auto shop - Our mechanics make house calls

Do Wipers Work Better With the Defroster On?

Wipers Work Better With Defroster

It seems that sometimes when you’re driving in cool, wet weather, it’s hard to keep your windshield from fogging up. The wiper blades wipe the windshield but they leave streaks. The outside of the windshield is clean but the inside is all fogged up. What is the best way to keep your windshield clear in cool, wet weather?

Keeping your windshield clean and clear depends on a few systems working together:

  • Windshield wipers
  • Heating and air conditioning system
  • Windshield defogger (defroster)

How systems work together to keep a clear windshield

While it may seem obvious that the windshield wipers, the heater, and the windshield defogger need to operate, air conditioning is also an important factor. Air conditioning does more than provide a cooling effect inside your vehicle. It also removes moisture from the interior, whether the air temperature inside is warm or cool. The drier air helps prevent the inside of your windows from fogging up in any sort of weather conditions. Air conditioning works especially well in combination with the defogger to not only dry the fog from the inside of the windows but to remove it from the cabin altogether.

The windshield defogger blows air directly on the windshield from the dash when the heater controls are set to the defogger setting. The air movement "dries" the moisture from the windshield, and clears the windshield for improved visibility.

The heat from the defroster also melts ice and snow on the windshield to allow the wiper blades to clear the windshield well. Some vehicles are also equipped with a couple defroster lines where the windshield wipers park to assist in melting ice and snow from the windshield in that area. That way the wipers don’t get stuck to the glass and can continue to clear the windshield properly. In that way, the wipers work better with the defroster activated.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...


Related questions

Q: why does the heated side mirror drivers side not work

Hi. There are a couple of reasons why your driver's side heated mirror is not working. The first thing that comes to mind is the fuse for the heated mirror has blown and is causing it not to work. Another...

Q: How do I remove the cowl panel on a car windshield wiper arm?

Hi there - to clarify, yes - once you have removed the nut which holds the wiper arm on to the splined shaft, yes, you can remove the wiper arm with the removal tool, then re-install the wiper on the...

Q: Does the Defroster Help the Wiper Blades Work Better?

The short answer is no. Wiper blades squeegee water from the exterior of your windshield and the defrosters remove moisture from the interior of the vehicle, which includes the inside of your windshield. Sometimes it may appear the defrosters are...