5 Essential Things to Know About the Defrosting System in Your Car

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When you are driving in the colder months of the year, one of the most important systems in your vehicle is your defroster. When you turn on the defroster, it clears the windows, which can help to increase your visibility. If the defroster has an issue, then it could create dangerous driving conditions.

How Does the System Work?

The defroster will take air and push it through the heater core and then dry the air. It blows onto your windows through the vents. The dry air will help to evaporate the moisture on the window and the hot air will melt any ice or snow that may have formed.

How Does the Rear Defroster Work?

While the defroster in the front uses forced air to provide a clear view for drivers, the rear defroster uses an electrical system. The lines on the back window are actually electrical wires. Electrical current will flow through the wires, which helps to remove the condensation that forms on the window.

Are the Wires in the Rear Defroster Dangerous?

They have only a small amount of electrical current running through them, and they do not get very warm. They are entirely safe.

What Causes Problems With the Front Defroster?

When the defroster is not working properly, it could stem from a number of different things. Some of the most common problems include buttons that stick or that no longer works properly, problems with the vents, and not enough antifreeze in the vehicle. In addition, there could be something that is blocking the fresh air intake. The thermostat might be malfunctioning, or the heater core could be bad. You may also have a bad blower that is not pushing enough air into the vehicle.

What Causes Problems With the Rear Defroster?

The rear defroster might have trouble working for a number of different reasons as well. It might have broken tabs that connect the circuit to the defroster, or there could be a broken grid that has damaged some of the wires. In addition, as the system gets older, it may stop working as well as it once did.

If you have issues with your car’s defroster, or any other problems with your vehicle, you need to take it to a good mechanic to have it checked out.


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YourMechanic Defroster is not working Inspection Service

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4.7/5

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Ben

40 years of experience
1145 reviews
Ben
40 years of experience
Ford Focus - Defroster is not working - Houston, Texas
thanks Ben!
Mercedes-Benz CLK500 - Oil Change - Houston, Texas

Emanuel

17 years of experience
81 reviews
Emanuel
17 years of experience
Honda Accord - Oil Change - Houston, Texas
I have used YourMechanic before, but had a different mechanic to have my oil changed and also to have my brake pads and calipers changed. When I booked this appointment for this oil change, Emanuel was assigned to do the job. However, he did not have any reviews, but I went ahead and booked the appointment anyway. Emanuel called 15 minutes before the 9am appointment, then texted again 5 minutes later when he arrived. He only took 35 minutes to change my oil. I came out to sign for the payment confirmation and he suggested I change out my rear rotors. I’ve known for a while that they are in need of changing soon, so I know that he was being honest in his assessment. He said he would send me a quote which he did immediately. Emanuel was professional, courteous, on time and did a good job in a timely manner. I would definitely have him do any future car repair or maintenance in the future.I have used YourMechanic before, but had a different mechanic to have my oil changed and also to have my brake pads and calipers changed. When I booked this appointment for this oil change, Emanuel was assigned to do the job. However, he did not have any reviews, but I went ahead and booked the appointment anyway. Emanuel called 15 minutes before the 9am appointment, then texted again 5 minutes later when he arrived. He only took 35 minutes to change my oil. I came out to sign for the payment confirmation and he suggested I change out my rear rotors. I’ve known for a while that they are in need of changing soon, so I know that he was being honest in his assessment. He said he would send me a quote which he did immediately. Emanuel was professional, courteous, on time and did a good job in a timely manner. I would definitely have him do any future car repair or maintenance in the future.
BMW X5 - Headlight Bulb Replacement (Driver Side Low Beam, Passenger Side Low Beam) - Houston, Texas
Emmanuel is one among the best..on time..friendly..fixes your car..highly recommend!!

Noe

35 years of experience
604 reviews
Noe
35 years of experience
Scion tC - Oil Change - Seattle, Washington
Noe was awesome! He showed up early, worked diligently, and even inspected a few other things for me that weren't required of him. He identified some severally worn brakes that I needed to replace immediately. Noe is a life saver!!!
Volkswagen Jetta - Battery - Seattle, Washington
Super from start to finish. He explains things thoroughly and thoughtfully.

Chris

21 years of experience
1698 reviews
Chris
21 years of experience
Infiniti G37 - Defroster is not working - Irvine, California
Chris was awesome! Arrived on time, was extremely knowledgeable and friendly! Quick and easy job! Would recommend him to everyone!!!

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