Hey guys. Not to long ago did I replace my AC resistor for my car. Its no hassle to replace but what dawns me is the fact that my old AC resistor that I replaced was burned, it literally looked like it caught on fire. The plastic melted and had some burned holes. This really puzzles me and scares me because I do NOT want my truck to catch fire because of the AC. Would you guys know any reasons why it would just burn like that? anyway to prevent it? I barley use the heater. Living in California you don't have that many cold days here accept the morning and I just use the heater to defrost my windshield and that's it.
Another possibility is the blower motor could be drawing too much power, causing frequent resistor trouble.
Try following the wires to the ground lead and once you find where it is grounded clean any corrosion and dirt off of if and under the connection.
Not a smart *** answer but they do burn old. If it happens again any time soon take your vehicle to a very good and reputable mechanic,