Start here buy gentle prying open the cover starting where the Grill/Touch Panel meet.

DO NOT PRY OPEN THE TOUCH PANEL SECTION UNTIL YOU HAVE LOOSENED ALL OTHER AREAS FIRST!

After the ceramic grill has been loosened then proceed to remove the rest of the front cover from the heater.

Be carful not to pull to hard when removing the cover, there are wires attached to the circuit board attached to the front cover. THERE DELICATE.