Hi,
When the vacuum stopped working - I knew it was electricity issue but forgot about the lose prong on the ply which at that point was not visible after I pushed it in a while back, a friend of mine tried to check the wiring to the motor. In opening the housing, he must have yanked it since the wire connecting motor to diode became detached at the connecting point to the diode. he didn't have volt meter to test th circuit and so when the motor didn't run, he said that the diode was bad. In fact, he was calling the diode "fuse'.
Yesterday, I got another friend take a look at the vacuum cleaner. connected the wire bypassing the diode and tested the circuit with his volt meter. He found out there was no electricity coming in and checked the plug and we found the one prong almost disconnecting. So, we replaced the plug and the vacuum is working. (He said that the diode can be bypassed w/ no consequences.) He was rushing and so I didn't push him to put the diode back and re-do the wiring but I am concern whether this setup is potentially dangerous to cause motor damage. In fact, the light at the base unit came on and went off soon after when I was vacuuming a small area. It made me wonder whether the light bulb there got damage due to bypassing the diode.
Anyway, should I put the diode back and re-connect? I do have a UPS (Uninterruptible Power Supply for computers) unit and I am wondering whether plugging the vacuuming cleaner to it instead of the wall outlet until I put that diode back and re-do the wiring. Or is it okay to just use the vacuum w/ bypassing that diode?