Yep, we took the Univolt out and it is definitely dead. It was actually pretty scary looking--it should have had "FIRE HAZARD" painted all over it!
I was expecting it to be a pain to remove since it was under the oven, but all it took was removal of four screws on the oven, disconnecting the gas line and cutting two wires, and we were golden! (oh, and of course, two strapping guys to pull out the oven...)
We'll be replacing that Univolt VERY soon. Thanks again for all your advice!!