Abstract: An improved comfort control system for controlling an environment regulation system includes a processing unit, a video interface, an input subsystem, a hierarchy of switching mechanisms and a special computer program. The hierarchy of switching mechanisms includes an electronic switching mechanism having a jumper and a second tier switching mechanism implemented by the special computer program and including a key combination. When the control device is in an operation mode and the jumper is in an enabled position, entering the key combination causes the special computer program to switch the comfort control system to the configuration mode. When the comfort control system is in an operation mode and the jumper is in a disabled position, the special computer program does not switch the control device to the configuration mode from the operation mode.

Abstract: A thermostat resists tampering by including a hidden mechanism for switching from a limit setting mode to an operation mode. In some embodiments, the switching mechanism is in the form of a tamper proof switch or jumper on the thermostat's circuit board. The switching mechanism can be hidden from a potential non-administrative user and can be located on the circuit board of the thermostat, as opposed to on the external housing. While the switching mechanism is in limit setting mode, the limits of the thermostat's temperature range can be adjusted. Once these limits have been set, the adjuster can move the switching mechanism to operation mode, and the thermostat will now be able to maintain temperatures within the new limit settings.

Abstract: A thermostat resists tampering by including a hidden mechanism for switching from a limit setting mode to an operation mode. In some embodiments, the switching mechanism is in the form of a tamper proof switch or jumper on the thermostat's circuit board. The switching mechanism can be hidden from a potential non-administrative user and can be located on the circuit board of the thermostat, as opposed to on the external housing. While the switching mechanism is in limit setting mode, the limits of the thermostat's temperature range can be adjusted. Once these limits have been set, the adjuster can move the switching mechanism to operation mode, and the thermostat will now be able to maintain temperatures within the new limit settings.