Lennox 93W73 Main Limit Switch 140°F

The Lennox 93W73 Main Limit Switch is a safety device intended for use in Lennox heating and cooling systems, mainly furnaces and air handlers. This little switch works like an invisible protector and constantly checks the temperature of the air with 24V 60Hz to avoid overheating and equipment. The switch helps to regulate the air temperature and cut power supply if the temperature goes high, which is dangerous for your furnace. In preventing over heating, the limit switch contributes to improving the general performance and life span of your Lennox HVAC system.