Blower motor problems

[Real_Mcoy23]

Got my dmax for about 5 months now and the ac been working ever since, not the best but still cooling, finally got the cabin air filter changed and couple days after the blower isn't blowing
What could have caused this? Also Previous filter was extremely dirty
I haven't got around to going down there and testing with my multimeter yet but it's really strange for something to happen as I change the filter

[Real_Mcoy23]

My problem was blower motor brushes so the post can be deleted now

[Mike C]

Maybe the increased air flow with the new filter pushed the blower motor brushes over the edge? Did you replace them or just clean up the brushes and armature?

[mydmax]

Mike C
That means the blower motor is better with a dirty filter if true. Brushes either stick in their guides or wear out. Possibly wear caused by overheating if the filter was restricting and elevating temp inside the blower motor. I would have thought better clean airflow would maximize brush life. Sound like the brushes were simply worn out and coincidental with the fitting of a new filter.

[Mike C]

I agree, it's probably a coincidence. Wonder how many km's R McC's dmax has done. A/C blowers usually outlast their vehicle-which is just as well as in many cars they are hidden well inside the dash assembly.

[mydmax]

Mike C
I would say that most blower motors fail to deliver before the vehicle life is up. The majority become dry in the bearings and load the motor starting and that causes more heat energy at the brush/commutator face and the load usually then burns the resistor, because the motor is stopped or sluggish and no/little airflow to cool anything let alone the resistor. Most here in "Straya" unscrew and remove by dropping down into footwell LHS because ttey are positioned between the plenum inflow duct and the aircon core and long before the heater core. Fairly easy job here. Maybe cranky Euro cars are different. Most I have owned or worked on here, the fan motor is out in 5 min. Usually three screws and a plug.

[Real_Mcoy23]

Hey everyone
So yes it's 3 screws and the plug for the blower and motor
Yes the 2 brushes were replaced
My mileage(not sure if the cluster is the OEM from factory one) is approaching 122k
I had someone change the brushes but he didn't do a good job so I may have to take it back down as the motor is whining while running

[Mike C]

Thanks, it's always good when posters give feedback on their final outcomes.