It could be - if you turn off the lights, can you see any arcing (mini-lightning) inside the unit? If you see sparking, you probably have accumulated dust/dirt inside that will need to be cleaned out. You may also have a crack or hole in the discharge plate(s), in which case you need to replace them.
Mine does it all the time when the ion plates gets dirty. Just clean them and the noise will stop.Mine does it all the time when the ion plates gets dirty. Just clean them and the noise will stop.
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It could be - if you turn off the lights, can you see any arcing (mini-lightning) inside the unit? If you see sparking, you probably have accumulated dust/dirt inside that will need to be cleaned out. You may also have a crack or hole in the discharge plate(s), in which case you need to replace them.
Let me know what you find.
Mine does it all the time when the ion plates gets dirty. Just clean them and the noise will stop.
Is it the ion type ,little flys are getting cooked on the eliments