Large Double Rocker Switch 3107/T

1) Unplug heater and lay on its side on secure surface.
2) Open cover panel (containing the switch) with a #2 Phillips screwdriver (one screw).
3) Take a photo of the wires at the switch so you don't forget anything. You could also make a drawing instead.
4) Mark with tape or labels which wire goes where.
5) Gent ... Read more ly pull off the wires from the 6 switch connections (do this by hand). They just a push fit connection.
5) Using a flat-head screwdriver, push the plastic tabs holding the switch to the plastic panel insert. It is a little hard to push both top and bottom tabs simultaneously, so you may need two screwdrivers and maybe a second person to help. Just be gentle and don't break anything. Have persistence.
6) Pop out the old switch and pop in the new switch so the tabs click into place. Make sure you get the right side up!
7) Rewire according to your photo and labels. Push the connections down tight.
8) Tighten all the other wire push connections while the cover is open (again, with your fingers).
9) Carefully tuck the wires back inside the cover and connect it back to the heater base and screw the cover screw by hand until you know that it isn't cross-threaded.
10) Use #2 Phillips screwdriver and tighten.

Followed the advice of others who had the same problem. Charted the switch connections before disconnecting and removing the old switch.
Removed the old switch by using a small screwdriver to depress the holding flanges on two sides of the switch and then "popping" out the switch.
Replaced with new switch by gently pushing it in ... Read more to the heater so that the holding flanges were not damaged and snapped into place.
Reconnected the wires.
Put power to the heater and the new two-part switch worked perfectly.

made a drawing of the switch and labeled the lugs 1 - 6. Then removed the wires one at a time and labeled according to the drawing. Removal of bad switch was easy and the new switch snapped right in