ICP Transformer for WPA4484000RKA1 — 40VA 208/230V to 24V | Ships Today
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Overview
This genuine ICP control transformer (OEM #1173691) steps line voltage down to the 24V control power that runs your contactor coil, thermostat circuit, and safety controls. Rated at 40VA with a 208/230V primary and a 24V secondary, it is the heart of the low-voltage system. This listing also covers the matching terminal barrier/cover (OEM #1176148) that protects the wiring connections. When a transformer fails — usually from an overloaded secondary, a shorted control wire, or age — the entire 24V system goes dead: the contactor won't pull in, the thermostat goes blank, and the unit will not respond to a cooling call. A repeatedly blown transformer almost always points to a short in the control wiring that must be corrected before replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer), 1176148 (barrier 24V 42-60) |
| Type | Control / Step-Down Transformer |
| Brand | ICP (Tempstar / Heil) |
| Capacity | 40 VA |
| Primary Voltage | 208 / 230 VAC |
| Secondary Voltage | 24 VAC |
Compatibility
Directly fits ICP/Tempstar/Heil condensing unit model WPA4484000RKA1 and related Comfortmaker, Heil, and Tempstar units using a 40VA 208/230-to-24V control transformer. Confirm primary voltage, VA rating, and secondary voltage before installing.
Installation Guide
- Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter.
- Access — Remove the electrical access panel to reach the control compartment.
- Document — Photograph the primary and secondary lead connections before disconnecting.
- Remove — Disconnect the primary and 24V secondary leads, then unscrew the transformer and barrier from the panel.
- Install — Mount the new transformer and barrier, then reconnect each lead per your photo.
- Test — Restore power and confirm 24V across the secondary and that the contactor pulls in on a cooling call.
Signs You Need a Replacement
- No 24V control power — thermostat blank, contactor won't energize
- Repeatedly blown low-voltage fuse
- Transformer hums loudly, runs hot, or smells burnt
- Zero volts on the secondary with proper primary voltage present
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