903429 Nordyne Intertherm Miller Gas Furnace Control Board

The 903429 Nordyne Intertherm Miller Gas Furnace Control Board is a replacement control board designed for several models of Intertherm, Miller, and Nordyne gas furnaces. It serves as the main electronic control for the proper functioning of your furnace, ensuring reliable operation.

Compatible Models

This control board is compatible with the following models:

M1MA 056A AW
M1MA 070A AW
M1MB 056A AW
M1MB 070A AW
M1MB 077A AW
M1MB 090A AW
M1MA 056A BW
M1MA 070A BW
M1MB 056A BW
M1MB 070A BW
M1MB 077A BW
M1MB 090A BW
M1MC 056A BW
M1MC 070A BW
M1MC 077A BW
M1MC 090A BW
M1MD 056A BW
M1MD 070A BW
M1MD 077A BW
M1MD 090A BW
M1MC 056A AW
M1MC 070A AW
M1MC 077A AW
M1MC 090A AW

Specifications

Part Number

903429

Signs You Need This Part

The furnace won’t start or fails to ignite.
Inconsistent heating or cycling issues.
Control board shows visible signs of damage.
Fault codes are flashing on the unit indicating a control issue.

Installation

Turn off power at the breaker.
Remove the panel covering the old control board.
Disconnect the wiring from the faulty control board.
Install the new control board by connecting the wiring and securing it in place.
Replace the panel and restore power to the furnace.

Frequently Asked Questions

Does the 903429 fit my gas furnace model?

This control board fits multiple models from Intertherm, Miller, and Nordyne as listed in the compatible models section.

Is this the left or right side part?

The 903429 control board is not side-specific as it is centrally located within the furnace system.

Does it include mounting hardware?

Mounting hardware is not included; you will need to use your existing hardware to install the new control board.

Restocking Fee:: No
Return shipping will be paid by:: Buyer
All returns accepted:: Returns Accepted
Item must be returned within:: 60 Days
Refund will be given as:: Money back or replacement (buyer's choice)
MPN:: 903429
Brand:: NORDYNE