ICP Transformer for WJH342000KTP0A1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM control transformer assembly steps 208/230V line voltage down to 24V control voltage for the ICP/Tempstar/Heil WJH342000KTP0A1 heat pump. Rated at 40VA, it supplies clean, stable low-voltage power to the contactor coil, reversing valve solenoid, defrost board, and thermostat circuit. The kit includes the 40VA transformer (1173691), the 24V reversing valve coil (1172619), the reversing valve with coil (1173708), and the 24V barrier (1176032). When a transformer fails, the entire low-voltage control circuit goes dead — no thermostat response, no contactor pull-in, and no compressor or fan operation. A buzzing, overheated, or visibly burned transformer is a clear sign of failure.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691, 1172619, 1173708, 1176032 |
| Type | Step-Down Control Transformer Kit |
| Brand | ICP / Tempstar / Heil |
| Rating | 40VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
Compatibility
Engineered as a direct OEM fit for the ICP/Tempstar/Heil model WJH342000KTP0A1 heat pump. The 40VA rating and 208/230V-to-24V configuration match the factory control circuit for reliable operation.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the control panel service cover to expose the transformer and low-voltage terminals.
- Document — Photograph all primary and secondary wire connections before disconnecting anything.
- Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the failed transformer from its mounting plate.
- Install — Mount the new transformer, reconnect primary and secondary leads exactly per your photo, and confirm tight terminals.
- Test — Restore power and verify 24V across the secondary and proper control-circuit operation.
Signs You Need a Replacement
- No 24V at the secondary terminals (dead control circuit)
- Thermostat unresponsive and contactor will not pull in
- Audible buzzing or humming from the transformer
- Burned, swollen, or melted transformer housing
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days