One problem related to defogger controls has been reported for the 2002 Mercury Sable. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2002 Mercury Sable based on all problems reported for the 2002 Sable.
The air blend door on my 2002 Mercury Sable broke for the third time this week. It is my understanding that this happens to many Ford customers. This time when it broke, the hvac system was stuck on heating. However, it can also become stuck in a/c mode which would present a problem in the winter if attempting to defog or defrost the windshield. My dealer fixed the defective part the last two times, and I'm sure they'll fix it again.