Tempstar 24V Transformer for TXH224AKC1 — 40VA Control Power | Ships Today

Overview

This OEM 24V control transformer supplies low-voltage power to the contactor coil, reversing-valve solenoid, and control circuitry on the Tempstar TXH224AKC1 heat pump. It steps line voltage down to a stable 24VAC at 40VA. When a transformer fails, the entire low-voltage control circuit goes dead: the contactor will not pull in, the reversing valve will not energize, and the system will not start. Common failures come from a shorted control wire, a seized contactor coil drawing excess current, or simple age-related winding breakdown. OEM part references for this assembly include 1172619 and 1172617.

Specifications

Compatibility

Engineered as a direct-fit replacement for the Tempstar TXH224AKC1 and shared ICP/Heil platform heat-pump models that use the same 24V control architecture. Always confirm the printed part number on your existing component before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the unit's electrical service panel.
3. Document — Photograph all primary and secondary leads before disconnecting.
4. Remove — Unscrew the transformer mounting bracket and disconnect the primary and 24V secondary leads.
5. Install — Mount the new transformer, reconnect leads exactly per your photo, and secure the bracket.
6. Test — Restore power and confirm 24VAC across the secondary terminals.

Signs You Need a Replacement

• No 24V power at the contactor or control board.
• System completely unresponsive at the thermostat.
• Burnt smell or visibly scorched transformer body.
• Repeated blown low-voltage fuse after reset.

Shipping & Returns

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