Issues with Koralia 2
 

So I removed 2 of my Koralia 2's this morning to clean them. One of them now makes a rattling sound -as though the impeller ceramic is hitting the sides of the motor housing.

I've disassembled and re-assembled, checked and re-checkd it about 6 times now and it keeps doing it. I thought that since the unit is pointed steeply down, there might be air trapped around the impeller (and there was) but removing that changed nothing.

I've got it unplugged for now since I'm not at home and I don't want to leave it unattended.

This unit is about 8 months old.

Thoughts ?

If it's similar to a Koralia 1, the metal rod has to fit into a small slot in the cap. if its not inserted properly, the power from the motor could be turning it (slightly) or causing issue. I can post pictures of what I mean when I get home.

+1, that could be the problem. Also make sure that the top cap (where the rod of the impellor goes into) is on properly and aligned.

The metal rod is part of the cap. I've pulled it apart 6 times figuring I didn't have it on right but it is -hence the confusion.

When mine made some noises I found a washer was actually missing, probably fell off when I was washing it. can't find the diagrams for them anymore.

No washers in these.

I plugged it in and it's been running about 20 mins now. I'm hoping it'll settle down after a bit.

i am not sure of your problem, but while its running under water, try sticking a tooth pick or what ever will fit by the impeller and give it a flick, turn, it might start up. It worked for me in the past.

My koralia has a small grey plastic washer that fits onto to bottom of the magnet. I almost lost it once.

MY K2 does the exact same thing, I think its the shaft moving up and down in the housing, the comments about the washer have me thinking that may just be the problem as there does seem to be a couple mm's play in the impeller.

Colin

I took a peak and a couple of my smaller Koralias, have a black washer at the base of the impeller magnet. This isn't smooth, but fits on the bottom contours of the impeller magnet itself.

Could this be causing your problem, if it is missing?