At 1241 hours Station 7 was dispatched mutual aid to Station 9 to 44517 White Pine Ct in Wildewood for the reported house fire. Engine 73 responded with a total of 6 personnel, arriving on the scene at 1248 hours with nothing showing from the outside. The crew on the Engine pulled a 1 3/4 hand line to the front door and found a light smoke condition in the house. The crew found that the reason for the smoke was because the flu was not opened to the fire place causing all the smoke to enter the residence. The Engine crew checked the attic area and the area around the fire place with the Thermal Imager with nothing found. Tower 9 set up ventilation and the units went in service at 1331 hours.