Rheem RTG20235BC Ignitor Coil — OEM High-Voltage Replacement for Tankless Water Heaters, Service-Friendly

Rheem RTG20235BC Ignitor Coil is a ProTech high-voltage replacement coil that delivers the spark needed to ignite the gas burner in compatible Rheem tankless water heaters.

This OEM-style replacement part restores reliable ignition to Rheem tankless units by sending a high-voltage pulse to the burner ignitor. Designed for straightforward access inside the appliance, the coil is intended to simplify maintenance and reduce downtime when a faulty ignition component prevents the pilot or burner from lighting. It’s a widely used component for technicians and homeowners who prefer an authorized, like-for-like replacement rather than aftermarket alternatives.

How does this ignitor coil restore burner ignition?

The coil generates a high-voltage spark that prompts the ignitor to light the gas burner, replacing a worn or failed ignition coil. Once installed, the coil resumes the electrical pathway required for the control module to create the ignition spark, restoring normal start-up sequences.

• Produces the high-voltage pulse necessary for burner ignition
• Replaces worn or electrically failed coils without modifying the appliance
• Works with the existing ignitor and control circuitry of compatible Rheem units

How easy is installation and access inside the tankless heater?

The RTG20235BC is designed for easy access within the service area of many Rheem tankless water heaters, so technicians can reach and replace it with minimal disassembly. Basic hand tools and standard safety precautions are typically all that’s required for removal and replacement.

• Service-friendly placement inside the unit reduces labor time
• Fits original mounting points for a direct swap
• OEM fit minimizes adjustments or rewiring

What are the performance and safety considerations?

This coil delivers a consistent high-voltage spark to the ignitor, helping ensure reliable burner starts when the control system calls for heat. As an electrical ignition component, it must be installed following manufacturer guidelines and local codes to maintain safe operation.

• Engineered to produce reliable ignition pulses under normal operating conditions
• Genuine factory-authorized part to match Rheem specifications
• Installation should be completed by qualified personnel to meet safety requirements

How does replacing the coil affect energy use and service life?

Restoring proper ignition reduces repeated start attempts and failure cycles that can waste gas and stress components. Replacing a degraded coil helps return the system to intended efficiency levels and can prevent related wear on the ignitor and gas valve assemblies.

• Stops inefficient repeated ignition attempts that consume extra fuel
• Reduces stress on ignition-related components when functioning properly
• Extends reliable service life of the ignition system with OEM-grade replacement

Who is this for: The Rheem RTG20235BC Ignitor Coil is suited for HVAC technicians, service professionals, and knowledgeable homeowners maintaining or repairing Rheem tankless gas water heaters. Choose this part when you want a factory-authorized replacement that fits original mounting and electrical specifications, simplifies servicing, and helps restore dependable ignition without aftermarket guessing.