The car defroster is an important safety feature, especially during those colder months. If you find yourself in the car with a frosted window and a defroster that isn’t functioning, you’ll need to address the problem as soon as possible. Here are 12 common issues, or steps to go through, in order to troubleshoot the car defroster correctly.
1. BUTTONS AND KNOBS
At times a malfunctioning defroster is because of buttons or knobs for the heat or defroster that have gotten stuck. This can be solved simply by turning them back and forth until they stay in the position for the defroster. Most times you will realize that you were just off by one setting and the problem is corrected.
A blown fuse may be another common problem when it has to do with the car defroster. Testing with a voltmeter and changing the broken fuse with an identical, working fuse can fix this issue quickly.
3. ABSENT TERMINAL EDGES
There is a possibility that you are missing terminal edges on your window. If this is the case, you can use a soldering gun to reattach them.
The battery could be the issue if you find that other aspects of the vehicle are not working in addition to the defroster. Jumping the car or changing the battery can solve this issue. Likely your battery will only need a jump if this is an isolated problem, but if the problem continues and your car is relatively old, a battery change might be necessary.
5. VENT ISSUE
There could be a clog in the vent that blows air onto the actual window. If this is the problem, you can try moving the vent shield around and also vacuuming or dusting it.
6. TINTED WINDOWS
While this isn’t an issue that you may think of, it is actually pretty common. If you have tinted windows on your car and you find that the defroster isn’t working, you may want to check to see if it’s the tint that has come off or cracked at all. If so, this may have caused some of the terminal edges to come off and you will need to fix the tint and solder them back to get your defrost working again.
Anti-freeze helps the car to operate smoothly when it’s cold. If you notice that your defroster isn’t working in the winter, adding anti-freeze is a good, easy solution to try.
8. FRAYED WIRES
The wires linked to the glass may be frayed or disconnected. To fix this, either change the wires or use electrical tape to keep them from fraying any further. Be sure that there is no harm of a fire happening.
9. CRACKED WINDOW
While it seems that, a crack in the window could affect the defrosting of the car. While typically you can tell if the window is cracked, there can be times where it is small still and hasn’t run yet. These cracks will obviously need a closer inspection to notice.
10. HARNESS CONNECTOR
This is found on the back of the driver’s seat and tends to loosen at times. If this is the case, check to make sure everything is intact.
11. DAMAGED GRID
A bad grid may cause you to have a hard time with the defroster. Typically you will want a professional to help you handle this, but it can be done on your own.
12. BAD ELECTRICAL CONNECTION
A bad electrical connection can occur because of poor cleaning or buildup. Taking apart the wiring and cleaning with rubbing alcohol will ensure that the defroster operates smoothly and that everything is safe and runs well.