My gas furnace was starting to act weird this past week ( 3 yrs old) so we had the furnace guy come in and have a look. The furnace was running ok just coming on every 4 mins. The service guy took it apart and one of the sensors was covered in sawdust. Hmmmm don't know how that could of ever happened. Couldn't possibly been that balsa sanding i was doing in the basement 2 weeks ago. So 80 bucks later and the service guy was on his way and all he did was wipe off the sensor. Oh yeah the "wife" was not happy.

Grinder.