ICP Transformer for WFMR070A036A1 — 40VA 120/24V | Ships Today

Overview

This is a genuine OEM control transformer (part number 1176944) for the ICP / Tempstar / Heil model WFMR070A036A1 gas furnace. The transformer steps down 120V line voltage to the 24V control voltage that powers the thermostat, gas valve, ignition control, and blower relays. It is rated at 40VA, the standard capacity for residential furnace control circuits. When this transformer fails, the entire low-voltage control system goes dead — the thermostat screen may go blank, the furnace will not respond to a call for heat, and the ignition sequence never begins. A buzzing transformer, a tripped low-voltage fuse, or scorched windings are common signs of a failed or shorted unit.

Specifications

Compatibility

Engineered as the factory replacement for ICP, Tempstar, Heil, Comfortmaker, and Arcoaire furnaces using the WFMR series, this transformer is a direct fit for model WFMR070A036A1 and shares the same electrical specification used across many 40VA residential control circuits.

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/blower compartment service panel.
3. Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting.
4. Remove — Disconnect the spade terminals or leads and unscrew the transformer from its mounting bracket.
5. Install — Mount the new transformer, then reconnect line and 24V leads exactly per your photo.
6. Test — Restore power and confirm 24V at the secondary and a normal heat call.

Signs You Need a Replacement

• Blank thermostat and no 24V control power
• Furnace completely unresponsive to a call for heat
• Audible buzzing or humming from the transformer
• Repeatedly blown low-voltage control fuse

Shipping & Returns

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