Electronic thermostat having safety feature

摘要

An electronic thermostat (7) includes a controller (13) which sends control signals to circuitry (15,17) used for activating a system (11) for conditioning air. The control signals are used to control the active state of the system for conditioning air. Safety cutoff circuitry (27,32) is incorporated into the thermostat (7) whereby the safety cutoff circuitry (27,32) is used to override the control signal sent from the controller (13) when a predetermined temperature defined by circuit (32) is reached in the space being heated or cooled.