Very loud noises when lights are on


Active member
Nov 29, 2012
Los Angeles, CA
Moved from here.. Very loud banging noises when lights turn on

I'm having the same issues and adding felt pads to the cover eliminated the loud banging noise. I'm still uncertain about the transformer buzzing when the light is on. I find it loud and quite annoying since it can be heard from the pool.
Here is a video comparing the sound level of the intelliflow pump (running at 1800rpm) with the sound level of the transformer, is that kind of sound level expected from the transformer? The Pentair 5G light it turned on using the Pentair Intellibrite controller and you can hear the characteristic on/off cycles at the beginning of the video.
PX300 transformer noise
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Gold Supporter
TFP Guide
Jun 7, 2017
Damascus, MD
That does seem pretty loud but it says it has a low voltage transformer in it. Transformers do hum but that seems excessive. My Jandy light makes no sound at all but there is no transformer. It does go through the clicks to change the color but it is just the relay clicking on/off. Then total silence.