mk4 fiesta zetec - heater control problems - gasspringmaker

When driving to work this week ive had the heater just on warm to take the chill off.

But the heater just gets hotter, even if i turn it right down to cold,

Dont know if this is connected but i had a cd player in the car witch would spit the cd out then take it back a few times , then go up through the presets on it's own.

So have replaced it with the factory unit,