Just recently moved into a new house.
The furnace is a older model (mid 90's) but seems to work OK.
One problem I notice is that when the system kicks on usually after about 1-2 minutes there is loud bang that comes from the bottom. This bang also happens after the system kicks off as well.
See the video below to show what I mean.
Is there anything I can do to mitigate this? I've tried bracing certain parts of the metal, but it doesn't really seem to help.
Any thoughts? Thanks!
https://youtu.be/T0YSbpQalbI (bang @ 25 seconds)