ICP 40VA Transformer for WFSR120D060A1 — 120V to 24V | Ships Today

Overview

This is the genuine OEM control transformer (part 1177217) for the ICP/Tempstar/Heil WFSR120D060A1 gas furnace. Rated 40VA with a 120V primary and 24V secondary, it steps line voltage down to the 24 VAC control voltage that powers the thermostat, gas valve, and control board. A failed transformer means no control power — the furnace simply won't respond to a heat call. This is a common, low-cost failure point worth keeping on the truck.

Specifications

Compatibility

Direct OEM replacement for the WFSR120D060A1 furnace and other ICP-family equipment using a 40VA 120/24V control transformer. Confirm your primary voltage tap is 120V and that the VA rating matches 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 service panel to reach the transformer mounted in the control area.
3. Document — Photograph the primary (line) and secondary (24V) lead connections before disconnecting.
4. Remove — Disconnect the leads, unbolt the transformer from its mounting bracket, and remove it.
5. Install — Mount the new transformer, reconnect the 120V primary and 24V secondary leads per your photo, and secure all connections.
6. Test — Restore power and verify 24 VAC across the secondary terminals and a normal heat call response.

Signs You Need a Replacement

• No 24V control power — furnace dead to a thermostat call
• Repeatedly blown low-voltage fuse on the control board
• Burnt smell or discolored transformer housing
• Measured secondary voltage absent or well below 24 VAC

Shipping & Returns

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