Not to high jack this thread... we built an addition in 2000 june and added a skylight to the roof above the kitchen . Life was great till 2008 hail storm; june 2009 insurance replaced the damaged shingles on roof & garage. To the Skylight the contractor just replaced the base around the...
All this information was very very helpful. I also had this 3 flashing code; I followed the steps recomended here.
What i found was on the exhaust out side there was a course screen to prevent birds from getting in, but on the intake there was nothing .
Found at the entrance to the...