OEM Carrier Fan Timer Control Board 20054502 for Model G1RR125A20

This is the factory OEM fan timer control board (part number 20054502) for the Carrier G1RR125A20 furnace. The fan timer control board is the central logic hub of your heating system — it sequences the ignition, manages blower timing, monitors safety inputs, and coordinates the entire heating cycle. When this board fails, symptoms typically include the furnace failing to start, the blower running continuously or not at all, repeated lockout codes, erratic cycling, or a complete loss of heating function. Replacing a failed board with a factory OEM unit restores proper factory-programmed timing and safety thresholds.

• Specs: OEM Part Number 20054502 | Carrier Fan Timer Control Board | Factory-programmed timing sequences | Designed for Carrier G1RR125A20 furnace | 120V input, 24V control circuit compatible
• OEM vs Generic: OEM boards carry the exact firmware, relay ratings, and terminal layout specified by Carrier engineering. Aftermarket boards may use generic timing profiles that can cause nuisance lockouts, improper fan delays, or reduced component lifespan — always use OEM for control boards.
• Install difficulty: 3/5 — Disconnect power and gas before beginning. Photograph all wiring harness connections before removal. Tools needed: 1/4" nut driver, Phillips screwdriver, needle-nose pliers. Label each connector before unplugging. If fault codes are present, note them prior to board replacement for diagnostic reference.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: This fan timer control board is the direct OEM replacement for the Carrier G1RR125A20 furnace. Always verify your existing board's part number against 20054502 before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — no guesswork required. In stock and ready to ship today.