ICP Transformer for RHS102H0BA0AAAA — 24V Control 40VA | Ships Today

Overview

This OEM 24V control transformer supplies low-voltage power to the contactors, reversing-valve solenoid, defrost board, and thermostat circuit on your ICP Tempstar Heil RHS102H0BA0AAAA heat pump. It steps line voltage down to a stable 24-volt secondary rated at 40VA. A failed transformer is one of the most common causes of a completely dead control circuit — when it goes, the system will not energize the contactor, the reversing valve will not shift, and the thermostat may show no power. Symptoms include a blown low-voltage fuse, buzzing at the transformer, no 24V at the R-to-C terminals, or a unit that runs on heat but not cool (or vice versa) when paired with reversing-valve faults.

Specifications

Compatibility

Engineered for the ICP-built RHS102H0BA0AAAA heat pump and the equivalent Tempstar, Heil, and Comfortmaker variants of the RHS102 series. Always confirm voltage and VA rating against your existing transformer before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Label and disconnect the line-voltage primary and 24V secondary leads, then unbolt the old transformer from its mounting bracket.
5. Install — Mount the new transformer, reconnect primary and secondary per your photo, and confirm tight terminals.
6. Test — Restore power and verify 24V across the secondary (R to C).

Signs You Need a Replacement

• No 24V reading on the secondary terminals.
• Repeatedly blown low-voltage fuse or tripped board fuse.
• Audible buzzing or burnt smell at the transformer.
• Thermostat goes blank or contactor will not pull in.

Shipping & Returns

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