I see that there was a query some 8 years ago about same problem..does anyone have a solution that does not require a call out from engineer as I live in remote area....

Sark lady, January 2012

There is a overheat thermostat on the dryer heater unit. This is a manual push reset. This stops the dryer element from getting too hot. If it trips again after you reset you will need an engineer the fan unit will be full of fluff. Not an easy repair for a non tech person (the hoses are not easy to remove and refit)

MC, February 2012