At 2140 hours, Companies 11 & 10 were dispatched to the Kids Peace School located @ 704 Hay Rd for an automatic fire alarm. Responding crews were advised of a smoke alarm activation by classrooms 15 & 16. Crews arrived to find audible and visual activations. The Temple crews made entry via the use of the Knox Box. The crew fromRescue 11 located the classroom and found a strong odor of smoke with a haze in the restroom vestibule. Deputy 11 at that time with that report assumed Kids Peace Command and Deputy 11-1 had interior ops. Company 13 was added to the detail. Upon the investigation, the interior crews determined a hearter unit was malfunctioning as it was pushing over 300 degrees on the motor. Ladder 10 arrived and went to the roof. There was a possibility tht there was some minor extension, soparts of the ceiling were opened up.All turned out to be negative. The building was ventilated and eventually turned back over to the property employees that were there with us. The heater was shut down and command was terminated. Co 11 was avail @ 2317 hours.