How do I issues shoot a noisy cadet heater?

Question by Vicarious Cynic: How do I trouble shoot a noisy cadet heater?
I'm up going to my father, and he has a cadet heater in his wall that it generating all kinds of sounds. It is a constant buzz audio that waxes and wanes in a normal pattern. Really should I difficulty shoot and consider to resolve it (what do I search for) or just exchange it?


Best solution:
Reply by melpossibly there is a screw or panel loose.

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