Lennox Furnace Control Board | B18099-13 | 1012-933D - F36GU

Lennox Furnace Control Board | B18099-13 | 1012-933D | OEM Integrated Furnace Control (IFC) Board | Tested Condition: Used – Tested & Fully Functional Availability: Ready for Pickup Key Specifications Manufacturer: Lennox OEM Part Number: B18099-13 Board Number: 1012-933D Sticker Code: 0004 Image Label: F36GU Component Type: Integrated Furnace Control (IFC) Board System Type: Single-Stage High-Efficiency (90+ AFUE) Gas Furnace Control Board Control Voltage: 24 VAC Diagnostics: Red STATUS LED Terminal Connections Thermostat Connections Supports single-stage heating: R – 24VAC Power C – Common G – Indoor Fan W – Heat Call Safety Circuit Connections LIM1 – High Limit Switch LIM – Limit Switch PS1 – Pressure Switch PS – Pressure Switch GV – Gas Valve FS – Flame Sensor 90+ I (2 terminals) N/U – Not Used Line Voltage Connections NEUTRALS PRI TRANS L2 BLK Accessory Outputs HUM – Humidifier TWIN – Twin Furnace Communication Harness Connector 9-Pin OEM Main Harness Connector Major Components Main Power Relay Potter & Brumfield T9AV5D12-22 Coil Voltage: 22VDC Form C Contacts 20A @ 240VAC (Normally Open) 10A @ 240VAC (Normally Closed) Blower Relay Potter & Brumfield T9AV1D12-22 Coil Voltage: 22VDC Form A Contacts 30A @ 120/240VAC Additional Relays One Siemens Power Relay Two Siemens Auxiliary Relays Electronic Components Dual control microprocessors (U1 & U2) Integrated ignition control circuitry Pressure switch monitoring Flame sensing circuit High-limit safety protection Diagnostic STATUS LED Features ✔ Genuine OEM Lennox furnace control board ✔ Designed for single-stage gas furnaces ✔ Controls complete ignition sequence ✔ Integrated flame sensing ✔ Pressure switch monitoring ✔ High-limit safety protection ✔ Humidifier output ✔ Twin furnace capability ✔ Tested and ready for installation Compatibility Direct replacement numbers: B18099-13 1012-933D Commonly found in select Lennox 90+ high-efficiency gas furnaces. ⚠️ Always verify your furnace model number, connector layout, and original board part number before purchasing. Why Buy This Board? ✔ Genuine OEM Lennox replacement ✔ Fully tested and verified ✔ Reliable ignition and blower control ✔ Built-in diagnostic LED ✔ Ready to install ✔ Local pickup available Pickup Toronto / GTA. Fast response. Local pickup available.