Defroster Blower Level Sometimes Changes on its Own

[georgebednar]

Does anyone else notice that the defroster blower level changes on it own from time to time? It has happened 3 or 4 times, but i cannot see a pattern yet. 2020 Ram Laramie 2500 with Cummins diesel.

 

[H3LZSN1P3R]

Does anyone else notice that the defroster blower level changes on it own from time to time? It has happened 3 or 4 times, but i cannot see a pattern yet. 2020 Ram Laramie 2500 with Cummins diesel.

Do you have the climate control or just the regular knobs

 

[lezmark7]

On a different engine and vehicle I had issues that turned out to be a leak in a vacuum hose that controlled the vent opening. In that case it was a pretty easy fix.

 

[H3LZSN1P3R]

On a different engine and vehicle I had issues that turned out to be a leak in a vacuum hose that controlled the vent opening. In that case it was a pretty easy fix.

I dont know if these are still vacuum controlled

 

[georgebednar]

Do you have the climate control or just the regular knobs

I have climate control, but I was just using the defroster via the fan speedmotor.