Hmmm. I don't know either.
You need to measure the dimensions of one of the switches. They can be 5 x 5 x 5mm or 6 x 6 x ?. You need to find some with the same pin spacing &
they look very easy to solder, I just need a source for a part.
The switches are known as tact (for tactile) switches. If you can remove one you might find a manufacturer & part number. Google ENG_CD_2-1437565-2_P5.pdf
Monitor never made switches for the Switch and Lamp. If you could get them from an electrical parts place, you would have to be very good with a solder
I have one of those barrel type propane space heater. The kind that puts out enormous amounts of heat. Very nice. But....after a short while it shuts
My 422 has worn out buttons on the control board. Does anyone know of a replacement part number? I plan on soldering new ones on.