ICP 24V Transformer for RHS102S0AB0AAAA — 40VA Control | Ships Today

Overview

This OEM 24-volt control transformer supplies low-voltage power to the control circuit on the ICP RHS102S0AB0AAAA heat pump. It steps incoming line voltage down to the 24V required by the thermostat, contactor coil, reversing valve coil, and control relays (related OEM control components include reversing valve coil PN 1172619, relay PN 1178205, and reversing valve assemblies PN 1175367 / 1190263). A failed transformer kills the entire control circuit — the thermostat goes dark and nothing energizes. Typical symptoms include a dead or blank thermostat, no 24V at the control board, a repeatedly blown low-voltage fuse, a burnt smell, or an outdoor unit that ignores every call.

Specifications

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil RHS102S0AB0AAAA heat pump and its low-voltage control circuit. The 40VA 24V rating is the standard control transformer specification used across many ICP-family heat pump and air handler platforms.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control compartment service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Label and disconnect the leads, then unmount the failed transformer.
5. Install — Mount the new transformer and reconnect primary and secondary leads per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and a live thermostat.

Signs You Need a Replacement

• Blank or unresponsive thermostat
• No 24V output at the control board
• Repeatedly blown low-voltage fuse
• Burnt smell or scorched transformer housing

Shipping & Returns

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