Lennox 29M18 Limit Control Switch 155-40F

The Lennox 29M18 Limit Control Switch is a device for furnaces and air handlers. This is a temperature guardian that is always monitoring the unit’s interior temperature. One of the parts only cuts the system off if the temperature reaches pre-defined level if the temperature is too high, the switch shuts it all down to prevent overheating and damage to equipment. The Lennox 29M18 operates between 155°F (highest limit) to 40°F (lowest limit). The switch prevents your HVAC system from potential threats by preventing overheating. With early temperature monitoring, the system runs within safe limits and reduces the chance for failures and malfunctions.