Suburban Water Heater Ignition Control Board 520814

The Suburban 520814 Ignition Control Board is a replacement control module for Suburban SW Series RV water heaters. The control board manages the direct spark ignition (DSI) sequence, controlling the gas valve and igniter while monitoring the flame signal to keep the water heater operating properly.

A failed ignition control board can cause the water heater to not ignite, fail to open the gas valve, stop sparking, repeatedly attempt ignition, or shut down shortly after lighting.

Fits Suburban SW Series Water Heaters

Suburban part 520814 is used with the following SW Series water heaters with a serial number above 953900766:

• SW4D Series
• SW4DE Series
• SW4DEL Series
• SW6D Series
• SW6DE Series
• SW6DEL Series
• SW10D Series
• SW10DE Series
• SW10DEL Series
• SW12D Series
• SW12DE Series
• SW12DEL Series
• SW16D
• SW16DE
• SW16DEL

Fitment can depend on the water heater serial number, so the existing board and serial number should be verified before ordering. Suburban parts references specifically identify 520814 as an SW Series ignition control module.

Signs of a Bad Suburban Water Heater Control Board

Common symptoms include:

• Water heater does not spark

• Gas valve does not open

• Burner will not ignite

• Ignition sequence starts but does not complete

• Burner lights and then shuts down

• Intermittent or unreliable ignition

Estimated Installation Time

15–30 minutes

Tools Required

• Screwdriver

• Basic hand tools

• Multimeter for troubleshooting, if needed

Potential Issues

Before replacing the control board, check the 12V power supply, ground connections, igniter, gas valve, thermostat/ECO circuit, wiring, and electrical connectors. Several problems elsewhere in the ignition system can produce symptoms similar to a failed control board.

Suburban Part Number: 520814