The plan to move into the new $6.1 million addition at the Carroll County Detention Center on Saturday was called off when corrections officials discovered a malfunction in a pump circulating hot water from a boiler.
"The water temperature was only 70 degrees," said Lt. Mark Peregoy, a jail spokesman.
A new pump has been ordered and is expected to be installed within a couple of days, he said.
Jail officials had received the go-ahead to move into the 100-bed addition last week. Trucks and work crews were ready to move larger furniture and files to the addition from the old portion of the detention center.
After about eight years in the planning stage, construction of the jail's new wing was delayed when excavators found tons of concrete and debris from 2 to 20 feet beneath the surface.
That delay caused the expected completion date to be set back to mid-May, but a series of changes in design further delayed completion of the project.
Last month, a state inspector denied occupancy permits until problems with two boilers were corrected.
Warden George R. Hardinger plans to move inmates into the wing in phases, while renovations are made to cell areas in the old portion.
Peregoy said the warden was reluctant to predict when the move will begin.
"We will be ready and begin moving as soon as the hot-water problem is corrected," Peregoy said.