ICP 40VA Transformer for RHS048H0BA0AAAA — 24V Control | Ships Today

Overview

This OEM control component (part 1175367) supplies the 24-volt control circuit for the ICP / Tempstar / Heil RHS048H0BA0AAAA. A control transformer steps line voltage down to the 24VAC needed by the thermostat, contactor coil, reversing-valve solenoid, and control board. Rated at 40VA, it provides enough capacity to hold all low-voltage loads pulled in at once. When a transformer fails — usually from a shorted secondary or a surge — the entire control circuit goes dead: the thermostat blanks, the contactor won't pull in, and the system won't respond to a call. Note: the OEM description for 1175367 reads "VALVE REV W/ COIL 24V," which indicates a reversing-valve coil; confirm the correct part before ordering against this transformer listing.

Specifications

Compatibility

Intended for the ICP RHS048H0BA0AAAA 4-ton heat pump and equivalent Tempstar, Heil, and Comfortmaker units using the 1175367 number. Verify primary voltage and 24V secondary rating against your existing transformer before installing.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter on both primary and secondary leads.
2. Access — Remove the control-box service panel to expose the transformer.
3. Document — Photograph the primary and 24V secondary wiring before disconnecting.
4. Remove — Disconnect the leads, unbolt the transformer from the control box, and lift it out.
5. Install — Mount the new transformer and reconnect each lead to the matching terminal per your photo.
6. Test — Restore power and confirm a steady 24VAC across the secondary and that the system responds to a thermostat call.

Signs You Need a Replacement

• No 24V at the control board or thermostat.
• Thermostat screen is blank with line power present.
• Repeated blown low-voltage fuses or a burnt-smelling transformer.
• Contactor and controls won't energize on a call.

Shipping & Returns

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