ICP Transformer for RHS048H0XA0AAAA — 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 RHS048H0XA0AAAA heat pump. Rated at 40VA with a 24V Class II secondary, it steps line voltage down to the safe 24-volt signal that every modern HVAC control circuit relies on. When a transformer fails, the whole low-voltage side goes dead: the thermostat loses power, the contactor never pulls in, and the unit won't run in heat or cool. Typical causes are a shorted secondary wire, a stuck contactor pulling excess current, or age-related winding breakdown. Installing the correct OEM-spec transformer restores dependable 24V control.

Specifications

Compatibility

Engineered for the ICP RHS048H0XA0AAAA heat pump and shared across many Heil, Tempstar, and Comfortmaker units 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 and reconnect primary and secondary exactly as photographed.
6. Test — Restore power, 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.
• Low-voltage fuse that keeps blowing after replacement.

Shipping & Returns

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