John - can I just say what a star you are for this answer - - I didn't realise those thermostat things could be reset like that - (this is after I went out to the Hotpoint shop and was sold a complete new element/thermostat set for £35... :-( - - but at least I have a spare now for when the element DOES go). For those looking for "step by step" instructions:
- Turn the power off!
- Take off the spindle cover plate (2 screws) on the back
- Take off the fan cover plate (about 8 screws around the perimeter) on the back.
- The heater/thermostat unit is attached to this with two more screws through the back of the fan cover plate: careful now as the heating elements can be easily damaged.
- On the "inside" of the heater/thermostat unit are the black sides of the two round thermostats. One should be unmarked - the other has a light blue/lilac dot on it. (As per other answer on this page you can check if they are working (or not) via an electrical meter or simple lamp circuit: resistance anything other than zero is good - else it has tripped).
- The hole John references is in the middle of the therm with the lilac dot. As John says, put a pin in the hole and press gently til you hear a click.
- Then reassemble in reverse order.
Hope this helps.
Dr Bob
April 2006