Hi Experts,
I have a comfort air, FXM4X3000A1 air handler and it has a small box on the side with an electrical connection. It has started buzzing lately and when I move the bottom cord around a little it stops buzzing. I checked to make sure that it's not just the cord vibrating against the unit. Its coming from the little box itself. Is this a small transformer or something like that? And does the buzzing mean that I should call someone to come and replace it soon?
I've included some pictures with more details.


I have a comfort air, FXM4X3000A1 air handler and it has a small box on the side with an electrical connection. It has started buzzing lately and when I move the bottom cord around a little it stops buzzing. I checked to make sure that it's not just the cord vibrating against the unit. Its coming from the little box itself. Is this a small transformer or something like that? And does the buzzing mean that I should call someone to come and replace it soon?
I've included some pictures with more details.
source https://hvac-talk.com/vbb/threads/2243869-What-is-this-small-box-on-the-side-of-the-air-handler?goto=newpost
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