Anyone have some experience with these things. My favorite builder is now doing the warranty on the last 120 houses she built and a popular call is "why does my dryer vent fan run all the time"?
The HVAC guy who actually installed them is baffled. The EC says he doesn't know much about them but there must be a switch somewhere.
Before they start "easter egging" around throwing parts at it I thought I would ask you guys.
