A/C Ducting

[55 SS]

This our first camper with the quiet cool and cold air return system. We've noticed when the a/c shuts off after being on for awhile the ducting seems to be making some noises. It's almost like the duct work or insulation is expanding/retracting from cooling to heating process. Just wondering if this is something normal with this system? Does anybody else experience this noise? Thanks.

[Shane Wood]

Originally Posted by 55 SS

This our first camper with the quiet cool and cold air return system. We've noticed when the a/c shuts off after being on for awhile the ducting seems to be making some noises. It's almost like the duct work or insulation is expanding/retracting from cooling to heating process. Just wondering if this is something normal with this system? Does anybody else experience this noise? Thanks.

Yes it is normal. Even the heating ducts in your stick and brick will do it. It is more noticable in the trailer as the material is thinner thus more contraction and expansion to the temperature variences