The Bainbridge Island Fire Department was called to a home near Koura Road Tuesday afternoon on a report of a structural fire.
The homeowner told fire crews she smelled burning and saw smoke filtering through the house.
Police and fire units arrived at the house around 2 p.m. Tuesday and found a furnace to be the cause.
“The furnace was pushing a little bit of smoke through the house,” said Assistant Chief Jared Moravec.
No fire was detected and emergency responders left shortly afterward.