The heating system in the Boling Apartments at UTC went offline on Tuesday afternoon on one of the coldest days of the year.
However, officials said the majority of the residence hall had heat again by 9 p.m.
One section, however, required more repairs, which will continue on Wednesday morning.
Officials said 132 students who live in the section were affected. They were contacted by university officials and offered alternative housing at the UTC Aquatic and Recreation Center.
The remaining Boling students - about 300 - were able to stay in their rooms.
The university will operate as usual on Wednesday, with all classes and activities taking place as scheduled.