If you have a Tumble Dryer that is not heating up but the drum is turning ok, then the chances are the thermal overload cutout has tripped. Some older dryers have a red reset button on the back of the casing, just press the reset untill you feel it click and you should have heat again. Neff, Bosch dryers have a reset button but you will have to remove the heater cover panel to access it, you will find it just above the heating element (a black stat with small red button) simply press the red button and if it clicks you've fixed it.
Most newer dryers do not have an external reset button (this is so you have to call out an engineer), but have what they call a one shot stat which cuts out and cannot be reset. These stats are normally located in or around the heater area and are very easy to replace.
Your best bet is to google your model number and you should find details on how to reset the thermostats or visit www.espares.co.uk for replacements.
Mr Omneo
January 2009
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Try fixfault.com to fix tumble dryers.