So, as the title says my interior fan intermittently comes on full from time to time no matter what position the control unit is on.
It usually only happens when the car has heated up and happens quicker on hot days; so I'm thinking it must be a heat sensor somewhere.
I'm thinking it could be a sensor in the a/c system but would that put the fan up full crank? as there is not auto climate control that works the fan to temperature...
This problem persists whether the a/c is on or off so it's no interior heat sensor.