Noisy AC filter...what are my options?

[RedFish]

I have an AC300.    It alternately runs quiet and then starts buzzing and will buzz for days if I don't do something.   Unplugging and plugging back in usually works.    Sometimes after the water change it  won't start until I shut the power off and on.

I have taken out the motor and cleaned the impeller, that was quite a while ago and it wasn't even dirty.

Is it just getting old?   Is there a guaranteed fix and what is it?

When it does this I start pricing canister filters......

[kennyman]

Check the metal shaft that the impeller rests on. If that is worn the motor is garbage. Also check the plastic housing that holds the impeller down. That is a removable piece and can become dislodged sometimes.

[Saltcreep]

Check the metal shaft that the impeller rests on. If that is worn the motor is garbage. Also check the plastic housing that holds the impeller down. That is a removable piece and can become dislodged sometimes.

The metal shaft is replaceable isnt't it? I always pull it out when I clean mine so I can get a toothbrush in to scrub the impeller chamber.

[kennyman]

Could be    I always thought is was epoxied into the motor housing but I have never tried pulling with a pair of pliers. I have a worn one in my fish junk closet. I will give it try 

edit; yep came right out. Thanks for the tip 

[Saltcreep]

Could be    I always thought is was epoxied into the motor housing but I have never tried pulling with a pair of pliers. I have a worn one in my fish junk closet. I will give it try 

edit; yep came right out. Thanks for the tip 

You're welcome.

You can buy replacements at any LFS. Beware the sticker shock though, I seem to remember it was around $5 for that little piece.

[RedFish]

Thank you...  I will check all the pieces out.