H5887 140F-20F Low Limit Snap Switch for Lennox Pellet Stoves - Direct replacement for Lennox/IHP 32078 and H5887, this “Proof of Fire” switch closes at 140°F to enable auger feeding & exit startup mode, opens at 20°F to shut down the combustion fan post-shutdown or low fuel, safeguarding stove operation. Perfect Fit for Target Pellet Stove Models - Fit for Lennox Bella, Montage 32FS, Winslow PS40/PI40, IronStrike Bella/Montage/Winslow, and Country Pellet stoves. No adapters or modifications needed for seamless installation. 140°F/20°F Temperature Safety & Cycle Control - Bi-metal snap disc mechanism triggers auger activation at 140°F and fan shutdown at 20°F, maintaining consistent heating cycles and preventing cold air backflow. Critical for reliable startup-to-run mode transition. Durable Ceramic & Bi-Metal Construction - Premium heat-resistant ceramic housing and bi-metal components withstand high exhaust temperatures and frequent on/off cycles in harsh stove environments, ensuring long-lasting reliability and reducing replacement frequency. Easy DIY Surface Mount Installation - Standard 0.9375" mounting hole spacing for simple surface installation on the exhaust motor housing. Disconnect old wires, remove screws, install the new H5887, and reconnect wires correctly—no professional skills needed, saving on service costs.