Dometic Furnace Sail Switch Issue

enahs wrote:
Checking circuit is next. Sail switch seemed initially to be the answer. Lots of on-=line issues with it. Now in Idaho

most of the time the sail switch is improperly diagnosed but people don't want to tell you they changed it for nothing. The first thing to do is to check to see if there is voltage through the sail switch when you start your ignition sequence. If you look up the electrical schematics, you will see there should be a line that goes through the limit switch and sail switch before getting to the board. If you have power at the board then it isn't either one of these. If you don't then it could be either or and you must test in between them to see which one it is. It's easy to find the wiring diagrams for the furnaces online and they will show you how yours is configured, sometimes they may have a circuit breaker in line also but mine doesn't.