ICP 40VA Transformer for WPA4304000RKA1 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer kit (OEM part #1173691, supplied with 24V terminal barrier #1176144) supplies low-voltage control power for the ICP/Tempstar/Heil WPA4304000RKA1 system. Rated 40VA, it steps 208/230 volts of line power down to the 24 volts that runs the thermostat, contactor coil, control board, and gas valve. A dead or weak transformer is a primary cause of a completely unresponsive system — no thermostat display, no relay pull-in, and no heating or cooling call. The included 24V barrier provides safe, labeled low-voltage termination. This kit restores correct control voltage and protects downstream low-voltage components.

Specifications

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil model WPA4304000RKA1 and related units using a 40VA 208/230V-to-24V control transformer. Confirm primary voltage taps and VA rating against your existing transformer before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage at the transformer primary with a multimeter.
2. Access — Remove the electrical/control service panel.
3. Document — Photograph the primary (line) and secondary (24V) wiring and the barrier connections.
4. Remove — Disconnect the leads and unbolt the old transformer from its mounting plate.
5. Install — Mount the new transformer and barrier, then wire the primary taps and 24V secondary per your photo.
6. Test — Restore power and confirm 24V across the secondary and a live thermostat/control circuit.

Signs You Need a Replacement

• Blank thermostat and a completely dead system
• No 24V reading across the secondary terminals
• Contactor or control board won't energize on a call
• Burnt smell or visibly scorched transformer housing

Shipping & Returns

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