Just before 2100 hours, Bryn Mawr Fire Company was dispatched to assist Station 24 on a building fire. Initial responding crews found a light smoke condition following electrical issues at the residence that day. Upon closer investigation fire was found in the walls of several sections of the large home. Extensive overhaul was required to bring the incident under control. Crews worked for many hours in very cold conditions to track the burned wires throughout the home while Peco worked to resolve the underlying electrical issue and de-energize the system. Bryn Mawr was back in service at ~2250.