Nordyne 626391R CO Auto Limit Switch 140°F

The Nordyne 626391R Auto Limit Switch L140F-30F is a component that measures the temperature and regulates the amount of electrical power used depending on the conditions of the heat in HVAC systems. This limit switch is installed in sources like heat exchangers or combustion zones and connected to the control circuit, which interrupts the power. When the temperature is high and then when it returns to normal, the switch is reconnected to the control circuit and the power is restored.