The Wakefield Building at Homestead/Wakefield Elementary School in Bel Air is closed to students and staff Monday because of a mechanical failure.
Harford County Public Schools said students who have classes in the Wakefield Building should not come to school Monday.
Students who have classes in the Homestead Building should report for school Monday as they normally would.
Pre-K classes at the school are canceled Monday.
All staff were told to report for regular hours Monday.
The nature of the mechanical problem was not disclosed.
According to HCPS, approximately 950 students are enrolled at the two-building school. The Wakefield Building, opened in 1958, is the older of the two buildings on the campus.
HCPS also said the Alternative Education Program at the Center for Educational Opportunity in Aberdeen is closed Monday, also because of mechanical issues. Staff were told to report on time, however.
Harford public schools will have their final day of the 2014-15 school year this Friday.