Last year (February 2015 to be exact) I replaced the motor on my pump. I do not know the age of the unit that was replaced as we had just bought the home; it appeared to be old though.
Opted for a 2-speed over the single speed that was there. Wired in a switch, replaced all seals and gaskets, re-used the impeller and put everything back together. Everything was fine and has been fine for the past year.
Came home from work yesterday and saw the vacuum wasn't moving but the pump was "on." It wasn't making any odd noises and there are no visible leaks, there was just no pressure.
I did some investigating. The switch is fine as the unit turns on normally and I can switch from low to high speed. There is no bearing noise or any abnormal noises coming from the unit. I took the electrical cover off and the shaft spins freely. In fact, it spins as it should when the pump is turned on both high and low speed. I then took out the strainer basket and tried to get my hand inside (everything off of course) and I think I can feel the impeller. I feel something in there that I can kind of spin by hand it is just hard to reach. Is that the impeller? Sounds silly as I did install everything myself but I am just not sure if I should be able to feel the impeller from there. Whatever it is, if I spin the shaft in the back by hand, it does not spin at the same time.
Does this sound like the impeller has sheared from the shaft? How common is this? I suppose this is compounded by the fact that the impeller itself is several years old. I am going to take it apart tonight. At 1 year on the install of the new pump with no leaks (not visible anyway) what gaskets or seals do you think I would need to replace in the process?