ActronAir LM24-HH Wall Controller is a 24-Hour programmable wall controller designed for residential ducted air conditioning systems, providing Auto, Heat and Cool modes with 8-zone capability and self-diagnosis fault code display. A faulty or damaged wall controller causes loss of system operation and zone control — fit the 100% Genuine ActronAir 2090-010 to restore factory system control. Low voltage inputs only — connecting 240VAC will damage equipment and void your ActronAir warranty.