ICP 40VA Transformer for WFEL070B048A1 — 120/24V | Ships Today

Overview

This OEM 40VA control transformer (part #1177217) steps 120V line voltage down to 24V to power the low-voltage control circuit of the ICP / Tempstar / Heil WFEL070B048A1 furnace. It supplies 24V to the thermostat, integrated control board, relays, gas valve, and pressure-switch circuits. When the transformer fails — typically from a shorted control wire, a stuck high-draw relay, or age-related winding breakdown — the entire 24V system loses power: a blank thermostat, no call for heat, and a furnace that gives no response. A scorched, discolored, or buzzing transformer signals it has overheated and needs replacement. This direct OEM replacement restores reliable 24V control power at the full 40VA rating.

Specifications

Compatibility

A direct OEM replacement for the ICP, Tempstar, Heil, and Comfortmaker family WFEL070B048A1 furnace. Confirm the primary voltage matches your supply (120V) and that the part number reads 1177217 before installing.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control compartment service panel.
3. Document — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.
4. Remove — Disconnect the leads and unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, reconnect primary to 120V and secondary to the 24V common/R circuit per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and normal system startup.

Signs You Need a Replacement

• Blank thermostat with no 24V control power
• System completely unresponsive to a call for heat
• Burnt smell or visible scorching on the transformer body
• Audible buzzing or repeatedly blown low-voltage fuse

Shipping & Returns

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