Discussion Starter · #1 ·
My house is about 10 years old now and this is the first time it happen in the winter. There is a cracking or popping sound along the ductwork underneath one of the bedroom on the second floor when the heater turns on. I have checked all other part of the house including the basement. It seems the issue is between the main and second floor which are covered. What can be done to fix this? Any suggestion is appreciated.