I'm looking for some advice on how to eliminate the popping noises (tin-canning)that are coming from my heating ducts. They only occur when the furnace is starting up and shutting down, and I know that the noises are due to the expansion and contraction of the metal, but the noise is excessive and the vent is right next to my bed.
The problems is complicated by the fact that my bedroom is on the 2nd floor of a 2-storey house, so I can't get to the vents to see where the popping occurs. I've tried to slightly shift the vents from the basement in the hopes that the noise will go away, but that didn't help.
Any ideas would be very much appreciated.