The kind of reaction that you might have to the humming of an air conditioning unit is truly something that you would enjoy once all has been said and is now out of the way. The reason behind this is that it can give you a really deep sense of relaxation if you think about it, and a lot of that relaxation would come from the knowledge that this hum is associated with the onset of cold air that your AC unit would be pumping into the room that you are currently inside of.
One of the tips for hvac repair that we feel like you should follow has to do with the situation where the humming from your AC unit continues well past the point where it is required. If your HVAC unit is humming even after you turn it off, this could indicate a very serious problem and if you want to be DIY about fixing it then the first part of the HVAC that you should end up checking is the compressor since this is the component that ends up creating the hum in the first place.
Cleaning your compressor out can make the likelihood of continuous humming lower than might have been the case otherwise. Hearing a hum but not getting the cold air that you associate this hum with can be truly frustrating for some, and it is easy to see why this might just happen to end up being the case in a lot of ways. The more you think about it the more apparent it becomes that this is a problem that you should implement a solution for as quickly as you possibly can.