ICP 40VA Transformer 208/230V to 24V for WJH324000K000A2 — Ships Today

Overview

This is a genuine OEM ICP control transformer (part number 1173691), a 40VA step-down transformer with a 208/230V primary and a 24V secondary used in ICP, Heil, and Tempstar heat pump systems. The transformer supplies low-voltage power to the control board, thermostat, contactor coil, and reversing valve solenoid. When the transformer fails you lose all 24V control power — the thermostat goes blank, the contactor will not pull in, and the reversing valve cannot shift, leaving the system completely inoperative. This unit is paired in the same circuit with the reversing valve coil (1172619), reversing valve assembly (1173715), and 24V barrier (1176032).

Specifications

Compatibility

Direct OEM replacement for ICP model WJH324000K000A2 and related Heil, Tempstar, and Comfortmaker heat pump systems using a 40VA 208/230-to-24V control transformer. Verify primary voltage and VA rating against your existing transformer before ordering.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter before touching wiring.
2. Access — Remove the control box service panel.
3. Document — Photograph the primary and secondary lead connections before disconnecting.
4. Remove — Disconnect the line-voltage primary and 24V secondary leads and unbolt the transformer.
5. Install — Mount the new transformer and reconnect primary/secondary leads exactly per your photos.
6. Test — Restore power and confirm 24V at the secondary and normal control operation.

Signs You Need a Replacement

• Blank thermostat or no 24V control power
• Contactor or reversing valve coil will not energize
• Repeated blown low-voltage fuse
• Buzzing, overheated, or burnt-smelling transformer

Shipping & Returns

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