Lennox 25J27 Limit Switch Out150°F In120°F SPST

The Lennox 25J27 Limit Switch is an essential safety device developed for Lennox HVAC equipment. This disc-style limit control, measuring a compact size is a vital component in the prevention of overheating. This makes it work as a normally closed circuit, that is, the circuit is complete till a certain temperature is achieved. In Lennox equipment, the 25J27 is set at 120 degrees Fahrenheit and shut off at 150 degrees Fahrenheit. If the temperature gets to a point that is higher than the point cut the circuit gets tripped and this prevents current from flowing to the heating element thus stopping the furnace from overheating. This auto shut-off system protects your Lennox equipment from any harm that may result from excessive heat production.