- 【Compatible】: R40403-003 furnace blower control board fits 40403-001, 40403-002, 20054502, ST9120A, ST9120B, ST9120C models.
- 【Solution to Common Issues】: If your furnace is not responding or has inconsistent performance, this control board could be the answer. It offers reliable operation for your heating system.
- 【Features】: Constructed from durable PCB material, it ensures excellent moisture resistance and stable performance. Designed to work seamlessly with both original and updated wiring configurations.
- 【User-Friendly Installation】: Easily replace your existing unit without needing additional wiring kits; installation instructions included for a smooth setup.
- 【Notes】: When removing the old board, consider taking a photo of the connections for easier reconnection later. This board is protected by a 5 amp replaceable fuse to safeguard your system.
On Apr 25, 2026 at 21:03:22 PDT, seller added the following information: