Blower control module life expectancy

[Devin]

In the HVAC system there is a unit called a Blowe Control Module that has a diode soldered to a finned heatsink. It goes right under the blower wheel. I pulled mine out and washed out all of the gunk, but it is still pretty ugly. Is this something that never goes bad?

 

[GreenStreak]

It most definitely goes bad. It happens all the time, and they're usually just replaced with a working used unit. If the fan or blower seems to be stuck on high all the time, it's going to be the BCM 99% of the time.

 

[ghostrider]

That usually last for about 100k miles. Moisture rotts out the components and trace leads.

 

[Devin]

That usually last for about 100k miles. Moisture rotts out the components and trace leads.

Damnit!