Attwood furnaces do indeed have a circuit breaker.. Outside, on top of the blower housing, looks like a switch but the schematic says it's a circuit breaker.Your furnace is 12V so it won't have any circuit breakers but there should be fuses and one of them will supply power to the furnace. As I asked in your other thread, what make and model is your furnace?
You missed the pointIt's a 12v circuit, John. No 1200vac generator involved.
Call it whatever you wish, but the design for a circuit breaker to open is called the trip point. I have been working in electrical service work for more than 40 years and have never seen a circuit breaker marked with a tripped setting but it is typically where the actuator is in a mid position and neither fully open or closed. To reset it you open it fully, the close it again.You missed the point
you said "it does not have a "Tripped" setting (and thus is just a switch)
I could have said "like the breakers on many generators do not have a "Tripped" position"