ICP Transformer for WFSR120D060A2 — 40VA 120/24V | Ships Today

Overview

This is the genuine OEM 40VA control transformer (part number 1177217) for the ICP / Tempstar / Heil WFSR120D060A2 gas furnace. It steps the incoming 120V line voltage down to the 24V control voltage that powers the thermostat, gas valve, control board relays, and inducer logic. When the transformer fails — usually from a shorted gas valve or a wiring fault that overloads it — the entire low-voltage control circuit goes dead: no thermostat display, no call for heat, and an unresponsive furnace. A blown transformer is often a symptom of a downstream short, so inspect 24V loads before powering up the replacement.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil WFSR120D060A2 furnace control circuit and related WFSR-series furnaces using a 40VA 120/24V transformer. Verify the primary voltage tap and VA rating before ordering.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter.
2. Access — Remove the control-compartment service panel.
3. Document — Photo the primary and secondary lead connections before disconnecting.
4. Remove — Disconnect the leads, unbolt the transformer from the panel, and check downstream 24V loads for a short.
5. Install — Mount the new transformer and reconnect primary (line) and secondary (24V) leads per your photo.
6. Test — Restore power and confirm 24V across the secondary and a normal thermostat call.

Signs You Need a Replacement

• No 24V control voltage and a dead thermostat
• Furnace completely unresponsive to a call for heat
• Transformer is hot, buzzing, or smells burnt
• Visible scorching or melted housing

Shipping & Returns

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