Lennox 47W64 Limit Control L210-30°F

The Lennox 47W64 Limit Control 210°-30°F is a safety device in HVAC systems including air handlers and furnaces. It constantly monitors the temperature inside the unit. The limit control has a temperature-sensitive sensor and electrical contacts. When the temperature inside the HVAC equipment exceeds the limit the sensor triggers the contacts to open. It breaks the flow of electricity to the heating element so the system doesn't overheat, and could cause damage or worse, fire. Although it is small, it is essentialto the safe and efficient operation of your HVAC system.