ICP Transformer 208/230V to 24V 40VA for WPA4484000RKB1 — OEM 1173691 | Ships Today

Overview

This genuine OEM control transformer (part #1173691) steps 208/230V line power down to 24V to run the low-voltage control circuit on your ICP, Heil, or Tempstar WPA4484000RKB1 unit. Rated at 40VA, it powers the contactor coil, control board, and thermostat circuit. This listing ships with the matching 24V terminal barrier (part #1176148, 42-60) for a clean, code-correct connection. When a transformer fails, the entire 24V control system goes dead — no contactor pull-in, no fan, no cooling — even though high-voltage power is present. A fresh OEM transformer restores reliable control power.

Specifications

Compatibility

Direct OEM fit for the ICP/Tempstar/Heil WPA4484000RKB1 unit and related ICP-family equipment using a 40VA, 208/230V-to-24V control transformer. Verify primary/secondary voltages and VA rating against your original before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the unit's electrical service panel.
3. Document — Photograph the primary (line) and secondary (24V) wiring and barrier before disconnecting.
4. Remove — Disconnect all leads and unbolt the old transformer and barrier from the panel.
5. Install — Mount the new transformer and barrier, then reconnect primary and secondary leads per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals with a multimeter.

Signs You Need a Replacement

• No 24V control power; contactor won't pull in
• Unit has line voltage but is completely unresponsive
• Burned smell or scorched transformer housing
• No measurable voltage across the secondary terminals

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.