To change the light bulb only part of the plastic fitting which is located around the temp control needs to be removed The piece that needs removing is in the centre of the total cover and is only clipped in so it can be prised down carefully to reveal the lamp. You will need to look closely to see the outline of the centre piece to insert a small knife or screwdriver in order to prise it down. It worked for me.
Allaid
June 2009