A Jonesboro home was heavily damaged in a fire Thursday afternoon that was caused by a pellet stove. Credit: Maine fire marshal’s office A fire that heavily damaged a Jonesboro home on Thursday afternoon was probably caused by a pellet stove, the state fire marshal’s office said. The blaze at 755 Route 1 was reported at about 3:48 p.m. No one was home at the time. Investigators from the fire marshal’s office visited the site on Friday and determ…