ICP Transformer for WPG3364090RKC1 — 40VA 208/230V to 24V | Ships Today

Overview

This OEM control transformer converts incoming 208/230V line voltage to the 24V control voltage used by the thermostat, contactor, relays, and ignition controls on your ICP Tempstar/Heil WPG3364090RKC1 system. Rated at 40VA, it supplies the current needed to drive the entire low-voltage control circuit. The kit includes the 24V barrier (OEM 1178431) and the 208/230V-to-24V 40VA transformer (OEM 1173691). A failed transformer typically leaves the control circuit completely dead — no thermostat response, no contactor pull-in, and no call for heat or cool. Watch for a buzzing or overheated transformer, a repeatedly blown low-voltage fuse, or zero volts on the 24V secondary.

Specifications

Compatibility

Directly fits the ICP Tempstar/Heil WPG3364090RKC1 packaged unit and other ICP-family models that use a 40VA 208/230V-to-24V control transformer. Always confirm the VA rating and primary/secondary voltage against the part you are replacing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the control/service panel to expose the transformer.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the old transformer and barrier from the panel.
5. Install — Mount the new transformer and 24V barrier, then reconnect the primary and secondary leads exactly per your photo.
6. Test — Restore power and verify 24V across the secondary terminals and proper control operation.

Signs You Need a Replacement

• No 24V at the thermostat or control board
• Repeatedly blown low-voltage fuses
• Buzzing, humming, or hot-to-touch transformer
• System fully dead with line voltage present

Shipping & Returns

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