Fire crews were called to the 67-hundred block of Highway 416 around 5:30 Friday morning.
A passerby saw smoke and flames coming from the house. Firefighters quickly got the fire under control. They say the furnace system on the west side of the house caught the outside wall on fire. The flames managed to burn a hole through a wall.
Crews say there were earlier reports of electrical problems with the furnance.
Nobody was home at the time except for a dog, which was rescued.