Yes, Mike, there are two heating sensors, one hooked to the lower side of one of the oil filled radiator tubes and another one on the upper part of that tube.
I have the same problem. The lower sensor is burned out and I am trying to find a replacement for it but no luck so far. This isn't much help to you, but I hope someone will see this and give us an answer.
Ted Atmore
November 2009
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