On October 14th at 2047hrs, stations 4/24 were alerted to smoke coming from the heater in Willow Grove Mill. Also dispatched engine and ladder 27, engine and tanker 26. At 2047 24-3 went en route and arrived at 2052hrs and found nothing evident with the residents outside of the house. After investigation crews found the heater had backfired and everything was safe inside the house. The scene was cleared at 2101hrs and the residents were allowed back in the home.