Lennox 39L06 Limit Switch

The Lennox 39L06 Limit Switch is an essential safety mechanism needed in HVAC units. it constantly checks on the temperature fluctuations and will power off the system if the temperature is too high. This is to avoid overheating and probably damaging the equipment A limit switch has a spring loaded device that on reaching a certain temperature closes an internal switch. This leads to the shut down of the HVAC system for some time to cool in order to avoid overheating. When the temperature drops to the safe limit, the switch resets and the HVAC can work.