ICP 24V Transformer for RHH090H0AA0AAAA — 40 VA Control Circuit | Ships Today

Overview

This OEM 24V control transformer and reversing-valve circuit kit supplies low-voltage power to the controls, contactor coil, and reversing-valve solenoid on the ICP Tempstar Heil RHH090H0AA0AAAA heat pump. It steps line voltage down to a stable 24V, 40 VA control signal that the board and relays rely on. When a transformer fails, the entire control circuit goes dead — the contactor won't pull in, the unit won't start, and you'll often find a tripped or buzzing transformer. Associated OEM components include reversing-valve coil 1172619 (24V), DPST relay 1178205 (T92P7A22-24), and reversing valve with coil 1175367.

Specifications

Compatibility

Engineered for the ICP Tempstar Heil RHH090H0AA0AAAA heat pump and other RHH-series condensing units using the same 24V control architecture. Always confirm your model and existing part numbers before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the electrical service panel from the condensing unit.
3. Document — Photograph all wire connections before disconnecting anything.
4. Remove — Note primary and secondary leads, then disconnect and unmount the failed transformer/relay.
5. Install — Mount the new transformer, reconnect primary and 24V secondary leads per your photo.
6. Test — Restore power and verify 24V at the secondary and proper contactor pull-in.

Signs You Need a Replacement

• No 24V at the control board or contactor coil
• Unit completely dead with line voltage present
• Buzzing, overheating, or visibly burnt transformer
• Repeated control fuse failures

Shipping & Returns

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