Sometimes the HVAC vents on the dash of my truck will just randomly start blowing air out even when the right **** is in the off position. Its always only the dash vents and never the floor or defroster vents.

The speed of the air depends on which number the left **** is turned to and the air is warm or cool depending on where the center **** is turned to. I can turn the blower speed up or down and it changes the speed like it should if the vents were actually on.

Lately it seems that sometimes when I turn the position switch to the floor heat position nothing happens for a bit and then heat will come out.

Its sometimes getting harder to stop the vents from blowing air when its supposed to be off.

I would like to know what is causing this to happen because its rather annoying and Id like to stop it from happening.

Could the switch panel be at fault?

 

i would look into the switch first

 

I think the switches are all connected on one panel that screws to the back of the surround plastic.

Atleast thats how it looked when I had the dash panel off last weekend (totally unrelated thing and Ive been having the problem for quite a while).