I seem to have an issue with my fan control on my ventilation system.
My car has dual temperature control, and whatever fan speed I set the digital display to, seems to bear no relation to fan speed output.
Even on the auto setting, the fan will pick up and slow down as and when it pleases.
It normally ends up after a few minutes of up and down, deciding that it wants to settle on a fairly high blow speed....which can be a little annoying !
All the a/c works fine....although up and down on fan speed.
Has anyone experienced this before