"jamesgangnc" wrote

If it's naturally vented (no fan in the vent system) ...

Yes, that is the case here.

then it's
probably a rollout switch.

Although the problem has been solved, I'd like to know just
what a "rollout switch" does. Can you explain how it works?
I've Googled "rollout switch" but all I learned were places
to buy them, not what they do or how they work. Is it a
switch that does anything more than shut off a circuit if
the temperature sensed by it exceeds a specified level?

Thanks for any enlightenment you can provide.