903429 Furnace Control Circuit Board Replacement for M1 Furnace Replaces 624602 6246020 624602A 624640

• Replace part number：903429, 624602, 6246020, 624602-0, 624602A, 624602B and 624640, 624640-A.
• Compatibility: The 903429 circuit board replacement works with M1 Furnace.
• Easy to install: Plug and play, it is recommended to take a photo before removing the old product to ensure that the wires are connected correctly.
• High Performance: Controls the unit fan speed, temperature settings, and other functions, improves the efficiency of your heating system, and ensures safe operation.

• Safe and Reliable: Made with premium materials, using excellent soldering and assembly techniques to ensure optimal performance.

Installation Instructions:

1. Power off the unit.

2. Remove the existing control board from the unit.

3. Install the new control board in place, making sure all connections are secure and properly aligned.

4. Connect all wiring to the new control board per the included instructions.

5. Replace any covers or panels removed during installation, then power on the unit.

Note: It is recommended to take a photo before removing the old product to ensure that the wires are connected correctly.