On 1-1-10, Battalion 1, Eng. Co 2 and Eng. Co. 22 responded to a report of a structure fire with a trapped occupant.  Upon arrival, crews found smoldering fire inside a exterior wall.  Law Enforcement and the homeowner knocked fire down prior to arrival.  The fire was ignited by the homeowner trying to melt ice from front steps utilizing a propane heater.  Crews were on scene for 1 hr.