Recently, we had trouble with our central vac. It would not shut off!! The way our Eureka Yellow Jacket works is as follows. One feature allows you to slide a gate up, which completes a circuit and turns the vacuum on so you can sweep dust up to it to be sucked into the bag. The other way is to insert the hose which has a metal band that makes contact inside the gate to turn the vacuum on. These contacts are wired to a small circuit board inside the vacuum unit. When the contacts to the circuit board are closed ( gate up or hose inserted) it allows 120vac to go to the unit and turn it on.
Our problem with the vacuum not shutting off when the gate is closed or the hose pulled out meant the contacts in the circuit board were melted closed. One would think you could just replace the circuit board, but noooo! The board is enclosed in the motor housing so you have to replace the whole unit. Luckily it was under warranty, but we still had to pay a mobile RV service fifty dollars to take care of it. Live and learning as we go along.
We love to travel in our 2021 Coachmen Beyond van about half of the year. Join us, if you will, to see where our adventures take us.