This is almost certainly a
This is almost certainly a failed relay. It happens.
Changing a relay isn’t hard – it is about the same level of difficulty as changing a wall switch. Often the hardest part is figuring out which one went bad (if there are more than one) but I usually replace them as a set.
Paragon has some good info here: http://www.paragonweb.com/Kiln_Pointer.cfm?PID=300
Helios Kiln Glass Studio