Hi all,

Seem to have a wee bit of a weird fault with my heater... Every time I turn the temperature dial even slightly away from full cold, a deep grating noise emanates from the heater housing, in behind the gearstick. It's pretty loud, and disappears immediately on selecting full cold again. This is completely independent of the blower motor, and is not connected in any way to it, regardless of speed. It started randomly one day, and I can't find anything helpful in the Haynes manual... Any suggestions gratefully received!