OEM Carrier Circuit Control Board HH680001 for Model U19X080UW36A

This is the genuine OEM factory replacement control board (part number HH680001) for the Carrier U19X080UW36A furnace. The integrated furnace control (IFC) board is the central brain of your heating system — it sequences the inducer motor, hot surface igniter, gas valve, and blower fan in the correct firing order while continuously monitoring safety inputs from limit switches and pressure switches. When this board fails, you may experience a complete no-heat condition, a furnace stuck in lockout, intermittent cycling, or error codes flashing on the diagnostic LED. Because the board orchestrates every stage of the heating cycle, a fault here can mimic symptoms of other failed components — always verify the board is truly the cause before replacing.

• OEM Part Number: HH680001 | Also replaces legacy part numbers 58GA680087, P771-1003, 75598, and 58GA75598 — confirms backward compatibility across production runs.
• OEM vs Generic: This is a genuine Carrier factory OEM board, not an aftermarket substitute. OEM boards carry factory-matched firmware, relay ratings, and terminal layouts, eliminating the risk of mismatched sequencing or false fault codes that aftermarket boards can introduce.
• Install Difficulty: 4/5 — High-voltage and low-voltage wiring are both present. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers, phone/camera for wiring documentation, and a multimeter. Label and photograph every connector before disconnecting. Turn off power and gas at the unit before beginning. Recommended for qualified HVAC technicians.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.

Compatibility: Designed as the direct factory replacement for Carrier model U19X080UW36A. Always cross-reference your unit's data plate part number before ordering to confirm fitment — especially on units that may have had prior board revisions. Need help verifying? Our HVAC parts specialists confirm fitment before you buy. Order now for same-day shipping.