ICP 40VA Transformer for WPA4304000RKB1 — 208/230V to 24V | Ships Today
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Overview
This genuine OEM control transformer kit (part number 1173691) is the factory replacement for the ICP/Tempstar/Heil WPA4304000RKB1 condensing unit and includes the matching 24V terminal barrier (part number 1176144). The transformer steps the 208/230V line voltage down to the 24V control voltage that powers the contactor coil, control board, and thermostat circuit. Rated at 40VA, it supplies enough current for the unit's low-voltage controls. A failed transformer is a classic dead-system fault: with no 24V output, the contactor cannot pull in and the entire outdoor unit stays off even though line power is present. Transformers typically fail from a shorted thermostat wire, a stuck contactor drawing excess current, or simple age-related winding breakdown.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1173691 (Transformer), 1176144 (24V Barrier) |
| Type | Control Transformer |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 VAC |
| Secondary Voltage | 24 VAC |
| Brand | ICP / Tempstar / Heil |
| Fits Model | WPA4304000RKB1 |
Compatibility
Built as the direct factory replacement for the ICP WPA4304000RKB1 condensing unit and shared across ICP-family outdoor units sold as Tempstar, Heil, Comfortmaker, and Arcoaire. Confirm the printed part numbers 1173691 and 1176144 and the 208/230V-to-24V, 40VA rating against your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the electrical access panel on the condensing unit.
- Document — Photograph the primary and secondary wiring and the 24V barrier terminal positions.
- Remove — Disconnect the primary and secondary leads, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer and barrier, match the primary taps to your supply voltage, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24VAC across the secondary terminals on a cooling call.
Signs You Need a Replacement
- Outdoor unit is completely dead with no 24V at the contactor coil.
- Thermostat screen is blank or the control board has no power.
- Visible scorching, swelling, or a burnt smell from the transformer.
- Repeatedly blown low-voltage fuse or no measurable secondary voltage.
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