The cabin blower fan for my AC/Heat does not always work. Sometimes it comes on,and at other times, it doesn't come on automatically, but will later kick on. Any suggestions on what the problem/solutions might be??

 

worn contacts in the fan speed switch, loose wiring or connections , fan motor burning out, well I could keep stabbing in the dark but check the aforementioned and see what is the culprit.

 

X2 what Oldblue says.

Another thing. If it will work on "high" without cutting off, but is intermittent in the other speeds, then it most likely is the fan resistor module.

 

yes sir, firemangeorge has a great point, let us know the results of your investigation!!