Description
The Lennox 18J27 is a limit control, which in fact is a safety mechanism that is essentyial for HVAC equipment to reduce the possibility for the equipment to get a harmful temperature to operate at. It works like the on-off toggle switch that breaks the electrical circuit to the heating or cooling coil when the temperature reading reaches the limit set. By switching off power, it avoids the development of heat or cold which are daunting both to human beings and machines, and could lead to dangerous occurrence. The Lennox 18J27 limit control is usually used in furnaces, air handlers, and packaged heating and cooling systems
