Re: Pump is making a buzzing/humming noise but is working
I suspect corrosion in the bearings, which means probably in the motor as well. If it runs nonetheless I'd just keep using it until it stops as once it gets to that stage it isn't economical to repair.
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No a noise filter is a different kettle of fish. That stops electrical interference noise from affecting your television, radios and electrical devices.
The most likely source of the hum is the start capacitor on the motor, or the motor itself.
Humming or Grinding
If your Samsung dishwasher makes noise when starting that sounds like a low hum, it's part of normal function. The motor makes this sound as it operates throughout the wash cycle. However, a dishwasher making loud humming noise or grinding sounds could mean that debris is caught in the drain pump.
is it only in heat? Possibly the heater contactor but I don't believe nordyne uses a contactor. could possibly be the transformer humming? many different strange noises come from units, may want to have it serviced.
I would check the caps on the power supply. They are rather large electrolytic capacitors that will look like they burst and/or leaking. When these die, the caps ground and the sub will make a loud buzzing sound. If you are handy with a soldering iron you can replace them yourself. Replace them with the same voltage or a little bigger and same with the size.
If the cap. says 16v 4700pF on it, for example, a 20v 5300pF or a 16v 6200mF cap. will work for this application.
Sounds like you've got a thread jam going on in the bobbin case area. Good cleaning and a new needle will probably fix it. See: https://answers.yahoo.com/question/index?qid=20091202121550AAHxN8y
The buzzing you are experiencing is most likely the electric valve solenoid coil.
That is the valve that lets gas in when the stove is turned on.
Another source of buzzing/humming can be a mechanical clock, if hter is one.
If it is digital, then it woul not make noise.
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