Suburban ST60/ ST42 Tankless Water Heater Ignition Electrode Assembly (233667)

The Suburban 233667 Ignition Electrode Assembly is an OEM replacement ignition component for the Suburban ST60 & ST42 tankless RV water heater. This electrode produces the spark needed to ignite the propane burner when hot water is requested.

If your Suburban tankless water heater attempts to start but fails to ignite, a worn, damaged, or improperly positioned ignition electrode could be responsible. Over time, electrodes can develop corrosion, cracked ceramic insulation, or other damage that interferes with reliable ignition.

The Suburban 233667 is designed to replace the original compatible electrode assembly and help restore proper burner ignition.

Key Features

• Genuine Suburban Replacement Part: OEM ignition electrode assembly for compatible ST60 tankless water heaters.

• Part Number 233667: Identified in the Suburban ST60 replacement parts diagram.

• Propane Burner Ignition: Produces the electrical spark required to ignite the burner.

• Direct Replacement: Designed to replace the original compatible ignition electrode.

• Tankless Water Heater Application: Used in Suburban's on-demand propane water heating system.

Technical Specifications

Signs of a Failing Ignition Electrode

The ignition electrode is an important part of the water heater's startup sequence. If it cannot produce a reliable spark, the burner may fail to ignite.

Common symptoms include:

• Water heater attempts ignition but produces no hot water.

• Repeated ignition attempts followed by shutdown.

• Weak, inconsistent, or missing ignition spark.

• Visible cracks in the electrode's ceramic insulation.

• Corrosion, damage, or excessive buildup around the electrode.

• Intermittent burner ignition.

Troubleshooting Tip: Before replacing the electrode, check that your water heater has adequate 12V power and propane supply. Ignition problems can also be caused by a faulty control board, gas valve, wiring, or combustion airflow issue.

Compatibility & Installation

The Suburban 233667 is listed as the ignition electrode assembly for the Suburban ST60 tankless RV water heater.

Verify your water heater's model number and original component before ordering. Do not assume compatibility with Suburban SW-series tank water heaters or other tankless models.

When replacing the electrode, inspect the ignition wire, ceramic insulator, mounting position, and surrounding burner components.

Correct electrode positioning is essential for reliable ignition. Follow Suburban's service instructions for the specified electrode gap and installation procedure.

Because this component operates within the propane combustion system, replacement and testing should be performed by a qualified RV technician. Never bypass ignition or flame-safety controls.

Frequently Asked Questions

Does Suburban 233667 fit the ST60/ ST42 tankless water heater?

Yes. Part number 233667 is listed as the ignition electrode assembly in the Suburban ST60 replacement parts breakdown.

Can a bad ignition electrode prevent my Suburban water heater from producing hot water?

Yes. If the electrode cannot produce a reliable spark, the propane burner may fail to ignite. However, other electrical and propane system problems can cause similar symptoms.

Does this part include the control board?

No. Suburban 233667 is an ignition electrode assembly, not the electronic control module.

Is this compatible with Suburban SW6D or SW10D water heaters?

Compatibility with these traditional tank-style models is not established. They use different ignition components, so always verify the correct part number before ordering.

At RV Water Heater Guys, we specialize in replacement parts and technical support for Suburban, Dometic, and Girard RV water heaters. Our goal is to help you identify the correct component and get your hot water working again without replacing parts you don't need.