Lennox 10P28 Thermocouple

The Lennox 10P28 is a Thermocouple, a vital part of an HVAC system, specifically in gas-based applications such as furnaces and water heaters. This device operates by thermal electromotive force, and it yields a little electrical signal when exposed to a change in temperature. It is particularly designed to track the pilot flame and ensure that the gas valve stays open and enables the appliance to run safely. In case of pilot flame failure or extinction, the thermocouple feels the temperature difference and immediately closes the gas valve to avoid the discharge of unburned gas and any probable dangers.