As a precaution, Philips is voluntarily recalling and replacing two Foldable Hairdryer models produced between February 2006 and April 2011.
The affected products are:
Philips Salon Essential Hairdryer HP4931
Philips SalonDry Travel Hairdryer HP4940
In very rare cases the hairdryer can overheat when left plugged into the electrical connection. This poses a potential fire hazard, even when the appliance is switched off.