ICP 24V Transformer for YH030GC — 40VA Heat Pump Control | Ships Today

Overview

This OEM 24-volt control transformer powers the low-voltage circuit on the ICP YH030GC heat pump, supplying the 24V the system needs to energize its reversing valve coil (part 34329055), control relays (parts 96467 and 1053004), contactor, and thermostat. The transformer steps line voltage down to 24VAC at roughly 40VA of capacity. A failed transformer is one of the most common no-heat / no-cool causes: when it opens or shorts, the entire control circuit goes dead and nothing energizes even though line power is present.

Specifications

Compatibility

Fits the ICP/Heil/Tempstar/Comfortmaker YH030GC heat pump and related control assemblies that use a 24V, 40VA transformer to drive the reversing-valve coil and control relays. Verify your original transformer's VA rating and lead configuration 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 service panel to reach the control box.
3. Document — Photograph all primary and secondary leads before disconnecting.
4. Remove — Disconnect the line-voltage primary and 24V secondary leads and unbolt the old transformer.
5. Install — Mount the new transformer, reconnect primary to line voltage and secondary to the 24V circuit per your photo.
6. Test — Restore power and confirm 24VAC across the secondary and that relays and the reversing valve coil energize.

Signs You Need a Replacement

• No 24V at the thermostat or control board — entire low-voltage circuit dead.
• Blown control fuse that re-blows immediately (shorted secondary).
• Buzzing, overheating, or burnt-smelling transformer.
• Relays and reversing-valve coil won't pull in despite line power present.

Shipping & Returns

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