"That's like teaching outside in the cold," said Dylon Taylor. "Might as well line up chairs and tables and teach outside right here right now."
Parents like Taylor are frustrated. This isn't the first time class has been canceled.
"Sometimes I have to bring my jacket into class because they don't adjust the heat right," said one student during a previous heating problem in November.
That was when Detroit Public Schools promised the problem was in the process of being fixed.
Now the first day back from break in frigid January weather and students are sent home because it's too cold in the classroom.
A letter sent home with students says school will be back open on Tuesday.
A spokesperson for Detroit Public Schools tells FOX 2 that the facility's management company became aware of a boiler problem on Friday but did not notify district staff.
Now both boilers are working and running for the classrooms to be warm for Tuesday.