ICP Transformer for RHS048H0XB0AAAA — 40VA 24V Class II | Ships Today

Overview

This OEM low-voltage control transformer supplies the 24V power that runs the contactor coil, reversing-valve coil, and control board on your ICP RHS048H0XB0AAAA heat pump. Rated at 40VA with a 24V Class II secondary, it converts line voltage down to the safe 24-volt signal every modern HVAC control circuit depends on. When a transformer fails, the entire low-voltage side goes dead: the thermostat loses power, the contactor never pulls in, and the unit will not start in heat or cool. Common causes are a shorted coil wire, a stuck contactor drawing excess current, or simple age-related winding breakdown. Replacing the transformer with the correct OEM-spec part restores reliable 24V control without guesswork.

Specifications

Compatibility

Engineered for the ICP RHS048H0XB0AAAA heat pump and shared across many Heil, Tempstar, and Comfortmaker units built on the same platform. Always confirm your existing transformer's VA and secondary voltage match before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before opening the unit.
2. Access — Remove the control-panel service cover to reach the transformer.
3. Document — Photograph every primary and secondary lead before disconnecting anything.
4. Remove — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the transformer from its bracket.
5. Install — Mount the new transformer, reconnect primary and secondary exactly as photographed.
6. Test — Restore power and confirm 24V across the secondary with your meter, then verify the unit starts.

Signs You Need a Replacement

• No 24V at the thermostat or control board.
• Contactor and reversing valve will not energize.
• Burnt smell or visibly scorched transformer windings.
• Blown low-voltage fuse that recurs after replacement.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.