Two problems related to defogger heater have been reported for the 2004 Lincoln Aviator. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Lincoln Aviator based on all problems reported for the 2004 Aviator.
The climate control does not work properly in the auto mode during winter driving, causing cold air to blast out of the demister and defroster vents. The windows cannot be cleared of minor icing and the driver is thermally very uncomfortable. The temperature difference from the floor vents vs. The demisters is as much as 70 degrees colder. The demister vents have measured temperatures of 40 degrees when the floor vent reads 110 degrees. Manual manipulation of the system has little effect and is highly unsafe.
Automatic heat climate control malfunctioned. As a result cold air blows out, fogging the windows.
| Defogger Heater problems | |
| Visibility problems | |
| Exterior Rearview Mirror problems | |
| Side/rear Glass problems | |
| Wiper problems | |
| Defogger problems |