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catman_gw

Noise in Fujitsu fan coil

catman_gw
11 years ago

I have a Fujitsu Halcyon split heat pump with 2 fan coils. One of them has an annoying hum audible at the registers that doesn't vary with fan speed. The pitch is ~500Hz. Could something be vibrating in the duct just caused by air motion? Or is there a common cause for something like this?

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