Solenoid Valve Resistor

RTG20319AF OEM Resistor – Solenoid Circuit Protection for Rheem Tankless Water Heaters

The Rheem RTG20319AF is an OEM resistor designed for use in the solenoid valve control circuit of select Rheem tankless gas water heaters. This component is responsible for managing electrical resistance within the solenoid circuit, ensuring the correct voltage and current are applied to prevent premature solenoid failure or erratic valve behavior.

Intended for direct replacement in compatible models, this resistor is a service-grade component built to meet Rheem's factory performance and safety specifications. It is typically installed in-line with the solenoid valve’s control wiring and contributes to stable operation of gas flow modulation during heater ignition and run cycles.

Functional Role

• Controls current to the solenoid valve coil to ensure stable valve actuation
• Prevents overcurrent conditions and limits thermal stress on valve components
• Supports consistent gas modulation performance during variable load operation

Technical Specifications

• Part Number: RTG20319AF
• Component Type: Solenoid resistor – inline electrical circuit component
• Application: Rheem tankless gas water heaters (model-dependent)
• Installation: Internal placement with existing solenoid valve harness

Installation Guidance

Install this component only after confirming model compatibility via Rheem service documentation. Power must be disconnected prior to installation. The resistor is typically installed within the appliance cabinet and connected using factory-style wire terminals or plug connectors. Follow all standard electrical safety practices, and verify continuity post-installation.

Installation is recommended to be performed by licensed contractors or technicians with experience in gas appliance servicing. Incorrect installation may lead to electrical faults, ignition failure, or improper valve operation.

Use Case Scenarios

• Component replacement during solenoid valve circuit troubleshooting
• Preventative service to avoid valve coil burnout due to electrical overloading
• Restoring OEM electrical balance during control board or wiring harness updates

Key Characteristics

• Resistor Type: High-reliability fixed resistor with terminal-ready leads
• Electrical Rating: Factory-calibrated for Rheem gas valve operating range
• Environment: Rated for use within sealed appliance enclosures