Fuse keeps tripping

Please stop using the mop before you have the thing catch on fire, or even your house/apartment.
What may have happened is the steam/water may have gotten in to the motor some how and is shorting it out.

Most likely the motor in clogged with dust and debris so the thermal fuse trips to keep the motor from burning up. Take it apart and clean it.

you have a blockage and the motor is overheating ,look for a blockage in one of the pipes

When a fuse trips, the current was to high. If the fuse keeps tripping, you really have a problem. It could be as simple as a defective capacitor, but also a shortage in one of the coils. It would be wise to bring the VAX to a repair shop and ask what it will cost to repair. Sometimes when they need to replace a motor, you are better of with a new machine.
I hope it is a minor defect.

Success

Any electrical device could trip out if in contact with water, potentially dangerous find the leak and you've solved your problem. PBK

Just answered this question a few times back.

I would replace the whole unit itself. It's obviously shorting. What kind of vacuum is it and how old?

You may have a stuck relay or one of your access port switches may be bad. According to the owners manual: "A complete check of all Wall Inlet and Power Unit low voltage control lead connections (external yellow leads). Turn system off by removing fuse or tripping circuit breaker at
house fuse box."

The fuse in the plug must have blown or you have a broken wire along the cord length somewhere. Is anything wet?

clean and wash all of the filters as this can cause the motor to run hot triping th thermal fuse. aslo dirt cannister pulled apart and rinsed through till clean helps.