Heater card
hi
Heater Control card that controls speed
control card can be found in the heater motor, firstly remove the wiring plug-in connecter, there are two cross headed self tappers holding the connecter block in the moter body take these out and out comes the control card, use a very short screwdriver
It is a small circuit board which is locaed in a very hard to get at place underneath and behind the glove compartment. about 30 minutes of fiddling around. The part was about £35
Glen