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Defroster Blower Level Sometimes Changes on its Own

georgebednar

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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.
 
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
 
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.
 
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
 
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