Abstract: A switch that is designed for use as an “emergency” shut off for heating, air conditioning (AC) systems or appliances is provided, but is certainly not limited to these specific applications and has applications in many other fields. The switch is configured with one or more indicators (visual and/or audible) configured to indicate when the switch has been manually turned off, even though power to the switch is still active. In this manner when the switch has been accidentally or inadvertently turned off by an unsuspecting user, they will be notified that the connected appliance (e.g. heating or AC system) has also been turned off.