ICP 40VA Transformer for WFHR040B036A1 — 120/24V OEM 1177217 | Ships Today

Overview

This OEM 40VA control transformer is the original low-voltage power supply for the ICP/Heil/Tempstar WFHR040B036A1 gas furnace, part number 1177217. It steps line-voltage 120V down to the 24V the control board, thermostat, and gas valve require. A burned-out or shorted transformer leaves the entire 24V control circuit dead — no thermostat response, no ignition, and often a blown fuse on the board. The 40VA rating provides the current headroom these furnace controls demand.

Specifications

Compatibility

Built for the WFHR040B036A1 furnace and used across ICP-family WFHR-series furnaces under the Heil, Tempstar, Comfortmaker, and Arcoaire labels. Confirm the 40VA rating and 120/24V configuration match your original before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and verify zero voltage with a multimeter.
2. Access — Remove the furnace control-compartment service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Disconnect the leads, unbolt the transformer from its bracket, and remove it.
5. Install — Mount the new transformer and reconnect the 120V primary and 24V secondary leads exactly per your photo.
6. Test — Restore power and verify 24V across the secondary terminals, then confirm normal furnace operation.

Signs You Need a Replacement

• No 24V control power; thermostat and furnace dead
• Repeated blown control-board fuses
• Burning smell or scorched transformer housing
• Buzzing transformer with no secondary output

Shipping & Returns

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