ICP Transformer for WJA436000KTP0A1 — 40VA 208/230 to 24V | Ships Today
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Overview
This OEM control transformer steps down the incoming 208/230V line voltage to the 24V control voltage your ICP/Tempstar/Heil system needs to run its thermostat, contactor coil, and low-voltage controls. Rated at 40VA, it delivers steady power across the entire 24V circuit. A failed transformer leaves the unit completely dead on a call for cooling or heating — the thermostat goes blank, the contactor won't pull in, and there's no low-voltage at the board. This kit includes OEM part 1173691 (TRANS 208/230 to 24V 40VA) plus OEM part 1176032 (24V BARRIER) for a complete, safe replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691, 1176032 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| VA Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Includes | 24V Barrier (1176032) |
Compatibility
Engineered as a direct OEM fit for the ICP/Tempstar/Heil WJA436000KTP0A1 condensing unit. The 40VA 208/230-to-24V rating is shared across many ICP-family WJA-series models — always confirm the primary voltage and VA rating against your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter on both line and low-voltage terminals.
- Access — Remove the control panel service cover to expose the transformer.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the line-voltage and 24V leads, then unbolt the failed transformer and barrier from the panel.
- Install — Mount the new transformer and 24V barrier, reconnect each lead per your photo, matching primary voltage taps.
- Test — Restore power and confirm 24V (±10%) across the secondary terminals on a call for operation.
Signs You Need a Replacement
- No power to the thermostat — blank display
- Contactor coil will not energize on a cooling call
- No 24V reading across the transformer secondary
- Visible burn marks, swelling, or a burnt-electrical smell at the transformer
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