isolate electic.
remove heater by pushing in on plastic spring clips either side, remove the four deepset screws holding casing, you will find cord tied to pull switch replace cord, replace in reverse order
alan
February 2014
Probably need to remove top or bottom rather than front. Get to the switch from there. Look underneath, for the screw holes.
SD
April 2012
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Try fixfault.com to fix fan heaters.