A temperature difference greater than 3°F (2°C) typically indicates a restricted core or a saturated desiccant that requires immediate replacement

Common Questions & Troubleshooting

shows visible scorching on the terminals

The setpoint range of 55 to 85°F (13 to 29°C) provides a versatile operating window for commercial and residential zones

this motor uses robust internal components to handle high duty cycles

Lennox 13W23 Limit Switch 319847-401 A temperature difference greater thanThe Lennox 13W23 Limit Switch is a critical OEM furnace safety control engineered for precise thermal monitoring in residential and light commercial HVAC systems. This auto reset limit switch is calibrated with an 80F cut in and a 140F cut out, functioning as a primary fail safe to interrupt the burner circuit if heat exchanger temperatures exceed safe operating parameters. By utilizing a genuine Lennox replacement part, technicians ensure the blower