ICP Transformer for WPG3484130RKC1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM control transformer provides the 24V low-voltage power that operates the control board, contactor coil, ignition control, and thermostat circuit on your ICP WPG3484130RKC1. Rated at 40VA with a dual 208/230V primary and a 24V secondary, it powers the entire control side of the unit. When it fails, the low-voltage circuit goes dead — no thermostat display, no call for heating or cooling, and no contactor engagement even though line voltage is present. This package includes the OEM transformer (part 1173691) and the 24V terminal barrier (part 1178431) for landing and isolating the low-voltage connections.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer), 1178431 (barrier) |
| Type | Control / Class 2 transformer |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 VAC |
| Secondary Voltage | 24 VAC |
Compatibility
Engineered for the ICP WPG3484130RKC1 packaged unit and shared across many Heil, Tempstar, and Comfortmaker furnaces, air handlers, and package units using the same 40VA 208/230-to-24V control transformer. Confirm the printed part number on your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter on both line and low-voltage terminals.
- Access — Remove the control-panel service panel to expose the transformer and wiring barrier.
- Document — Photograph all primary and secondary wires before disconnecting.
- Remove — Disconnect the primary leads matched to your supply voltage, the 24V secondary leads, and unbolt the transformer from the panel; transfer the barrier if reusing landing terminals.
- Install — Mount the new transformer, land the correct primary taps for 208V or 230V, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24VAC across the secondary and a normal thermostat call.
Signs You Need a Replacement
- No 24V control power — thermostat blank and unit unresponsive.
- Repeatedly blown low-voltage fuse or tripped control circuit.
- Buzzing, overheated, or visibly scorched transformer body.
- Measured secondary voltage well below 24VAC under load.
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