How do I test the 100073343 flame sensor

or a pressure drop across a clogged filter drier

Common Questions: Why is my compressor making a loud noise at startup

allowing you to filter out phantom current or idling motors

The 163893 provides a 0

Lennox 73W20 Limit Switch 323613-751 How do I test theThe Lennox 73W20 Limit Switch is a critical safety component designed for precise thermal regulation within Lennox residential furnaces and HVAC systems. As an OEM Lennox replacement part, this L175 30F limit control features a fixed set point, engineered to open the electrical circuit at 175F and automatically reset when temperatures drop to 145F. This SPST (Single Pole Single Throw) switch utilizes a 5 inch stilt mounting insertion depth to monitor