Try replacing the dryer duct NTC,
its the most common failure on the 1400/1600,
the NTC is located on top of the drum in the metal housing,
isolate the power to the appliance and remove the lid,you will see the NTC its a circular disc mounted to the duct with one wiring connector.
check the wiring for breakages with a meter,
failing the NTC replacement then it will need a new pcb,
but experience tells me that the NTC is the most likely cause.
paul, March 2012