A problem in computerized controls has shut down the air-handling system of the Haines School’s Voc Ed building, part of an $864,099 heating and ventilation upgrade to the building completed in October.

School maintenance chief Gary Stigen said the problem with the air handler was noticed at the end of winter, but Premier Electric of Wasilla, the lead contractor on the project, has yet to fix it.

Stigen and interim superintendent Rich Carlson this week…