After using the vac for 10 minutes or so, the motor starts turning on and off with greater frequency the longer I let it run. Eventually it is on and off so frequently that it has no power. Would this possibly be the 24V relay? I have checked the breaker on the unit and it is not tripped. Does the motor have a thermal overload switch separate from the breaker?
Vacuums - Electrolux - Centralux Vacuum
Answers & Comments
No it dosen't. I fix central vacs all the time and relays usally don't do what you described. They either go out all the way and won't turn on or they will trip and you will have to push the breaker back in. What is probably happening is you have a short in your low voltage wiring. this wiring goes from the hose handle all the way back to the unit (you can see the two little wires clip in to the side of the unit). My guess is that it is in the hose some where and when you turn it a certain way it shorts and the unit turns off. It can be hard to find shorts sometimes so you might need to call an expert.