if you have recently removed the fan guard for cleaning then that can have a microswitch which prevents the element coming on, ensure the guard screw are fully tightened.
the element may have blown, or the thermostat may be broken. thermostats have a capillary and bulb which if broken will fail safe, that is "in the off position". the dimmed bulb may point to faulty wiring it is hard to say without a circuit diagram, you could try removing and replacing the bulb to see if it is just a poor contact. isolate the appliance from the mains before doing any of the above checks.
Maestro
November 2008