ICP Transformer for WFAR100C060C1 — 40VA 120/24V | Ships Today

Overview

This is a genuine OEM 40VA control transformer (part number 1177217) for the ICP / Tempstar / Heil WFAR100C060C1 gas furnace. The transformer steps down 120-volt line power to the 24-volt control voltage that runs your thermostat, gas valve, ignition control, and relays. Without a working transformer the entire low-voltage control circuit is dead. Common failure symptoms include a completely unresponsive thermostat, a furnace that will not start, a blank display, or a transformer that buzzes, runs hot, or has visibly burned windings. A 40VA rating provides ample capacity for the furnace control load plus a typical 24V cooling contactor.

Specifications

Compatibility

Engineered as a direct OEM replacement for the ICP WFAR100C060C1 furnace and shared across many ICP-family models sold under the Tempstar, Heil, Comfortmaker, Arcoaire, KeepRite and Day & Night brands. Always confirm your existing transformer is rated 40VA with a 120V primary and 24V secondary before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter at the transformer primary leads.
2. Access — Remove the furnace blower-compartment service panel to expose the control area.
3. Document — Photograph all primary (line) and secondary (24V) wire connections before disconnecting anything.
4. Remove — Disconnect the line-voltage and 24V leads, then unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, then reconnect the primary and secondary leads exactly per your photo.
6. Test — Restore power, confirm 24 VAC across the secondary terminals with a multimeter, and verify the thermostat and furnace respond.

Signs You Need a Replacement

• Thermostat display is blank and the furnace will not power on
• No 24 VAC measured across the secondary terminals
• Transformer buzzes loudly, runs extremely hot, or smells burnt
• Repeated blown control fuses or tripped low-voltage circuit

Shipping & Returns

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