I have an '06 Trailblazer that has had the #36 fuse (HVAC) consistently go bad during the summer heat. Here is what I have done so far:
1. Replaced the fuse (obviously). When I do, it rarely blows again right away, there is no consistency to when and why it fails. It will fail at start up and while the engine is running.
2. Replaced all of the vent actuators (had to, one of them was allowing hot engine air into the pax compartment...too hot for Texas!)
3. Took the car to a dealership where they tried some troubleshooting for an hour. They were concentrating on the fuse box underneath the rear passenger seat. Unfortunately, this did not help.
4. The fuse seems to blow more when the temperature is above 95 degrees
5. I have also filled the a/c system with additional refrigerant (last weekend). The fuse blew 2x this week.
Any ideas on what else I can try to do to narrow down the problem?
Thanks,
Marc
1. Replaced the fuse (obviously). When I do, it rarely blows again right away, there is no consistency to when and why it fails. It will fail at start up and while the engine is running.
2. Replaced all of the vent actuators (had to, one of them was allowing hot engine air into the pax compartment...too hot for Texas!)
3. Took the car to a dealership where they tried some troubleshooting for an hour. They were concentrating on the fuse box underneath the rear passenger seat. Unfortunately, this did not help.
4. The fuse seems to blow more when the temperature is above 95 degrees
5. I have also filled the a/c system with additional refrigerant (last weekend). The fuse blew 2x this week.
Any ideas on what else I can try to do to narrow down the problem?
Thanks,
Marc