Fetco 108035 Board Assembly Reference

What this board assembly does

A control board serves as the central hub for electrical connections in your equipment. It receives signals from controls and switches, then routes power to specific components during operation.

Most control boards and thermostat circuits use a 24 V control signal from a transformer. When a control board develops a fault, the equipment may fail to start, shut down unexpectedly, or stop responding to normal sensor inputs.

Board assembly dimensions

Control boards must fit inside an existing electrical housing or control box. Compare the size of your old board to these measurements before attempting an installation.

The physical dimensions for part 108035 are:

• Height: 1.95 in / 4.95 cm
• Length: 7.7 in / 19.56 cm
• Width: 4.65 in / 11.81 cm

How to confirm a replacement matches

Matching a control board requires checking the printed part numbers directly on the board. Do not rely on appearance alone, as different circuit boards can share similar shapes or terminal layouts.

Each board lists the part numbers it replaces. Check the replaces list to see if the number on your old board is listed. For this part, ensure the number 108035 matches the label on your existing board assembly.

• Check the part number on your old board to confirm it shows 108035.
• Make sure the physical dimensions match the mounting space inside your cabinet.
• Confirm the ignition type is the same if your equipment uses a furnace control board.

How to replace a board assembly safely

A failed board may show signs of burnt traces, loose terminals, or unresponsive relays. Before touching any wiring, make sure all power to the unit is completely shut off.

Control boards have many wires connected to different terminals. Careful preparation prevents mistakes during the swap.

1. Shut off power at the breaker panel and test the connections with a meter to verify no voltage remains.
2. Take clear photos of every wire and terminal connection before removing anything.
3. Label each wire so you know its exact location on the board.
4. Disconnect the old board and secure the replacement in the mounting bracket.
5. Move wires one at a time to the matching spots on the new board.

Read your old part

1. Turn off power to the unit and open the access panel to reach the control board.
2. Locate the printed label or silkscreened stamp on the face of your old board.
3. Check that the part number reads 108035.
4. Measure the height, length, and width of your existing board to ensure it fits the 1.95 in / 4.95 cm by 7.7 in / 19.56 cm by 4.65 in / 11.81 cm dimensions.
5. Take clear photos of all wire connections before unclipping any terminals.