ANother question, if I may. There is a 10 inch tube sticking out of
the left rear of the oven, that goes into a round part on a bracket
which hangs down from the top of the oven. This round end of the
bracket encircles the end of the tube. There are 2 blobs of solder-
like material inside the round part of the bracket. The round part can
be moved left and right. The solder-like blobs are not connected to
the tube. Is this some sort of a switch that reacts to the heat level
in the oven ? Are those solder-like blobs supposed to be there ?

Thanks