Ruud 45-106229-04 SEER2 Air Handler Adapter Board

Product Description

The RUUD 45-106229-04 is an adapter board designed to interface new SEER2 air handlers with older-generation electric heat strips. When Rheem and Ruud updated their air handler control architecture for SEER2 compliance, the updated control board became incompatible with legacy heat strip wiring configurations. This adapter bridges that gap, allowing technicians to retain existing heat strip assemblies rather than replacing the entire heating section. It is installed by licensed HVAC technicians during system upgrades or equipment changeouts where the air handler is being replaced but the existing heat strips are being kept in service.

This adapter is intended for residential HVAC applications where a new SEER2-compliant air handler is being paired with legacy RXBH-1724 or WRX series heat strips. It is a practical solution during retrofit installations where replacing the heat strips is not cost-effective or practical. New air handler models RF1PZ, RF2TZ, and RH1PZ are confirmed compatible with this adapter. Technicians should verify the air handler model before ordering to ensure correct fitment.

Key Features

• Bridges new SEER2 air handler control boards to legacy heat strip wiring configurations
• Compatible with RXBH-1724 and WRX series heat strips
• Supports new air handler models RF1PZ, RF2TZ, and RH1PZ
• Not compatible with RH3V or RHMV models — those systems require a new heat strip assembly
• Simplifies retrofit upgrades by eliminating the need to replace functional legacy heat strips

Compatibility

Compatible with new Rheem and Ruud air handler models RF1PZ, RF2TZ, and RH1PZ when used with legacy RXBH-1724 or WRX series heat strips. Not compatible with RH3V or RHMV models — installations involving those air handlers require a new heat strip rather than this adapter.

Installation Notes

Installation should be performed by a licensed HVAC technician. Disconnect power to the air handler at the breaker before beginning any work on the control board or heat strip wiring. Confirm the air handler model is on the compatibility list prior to installation, as using this adapter with an incompatible model will not resolve the wiring mismatch. Follow all applicable NEC requirements for low-voltage and line-voltage connections within the air handler cabinet.

Technical Specifications

• Function: SEER2 air handler to legacy heat strip adapter board
• Compatible Heat Strips: RXBH-1724, WRX series
• Compatible Air Handler Models: RF1PZ, RF2TZ, RH1PZ
• Incompatible Models: RH3V, RHMV

Standard Information

• Brand: RUUD
• Manufacturer Part Number: 45-106229-04