ICP Transformer for WFAR060A042A1 — 40VA 120/24V | Ships Today
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Overview
This OEM 40VA control transformer (part #1177217) supplies the 24V control power for your ICP Tempstar Heil WFAR060A042A1 gas furnace. It steps the incoming 120V line voltage down to the 24V that runs the thermostat, gas valve, igniter circuit, control board, and blower relays. Its 40VA rating provides the current needed to operate the full low-voltage control system at once. A failed transformer kills the entire low-voltage side of the furnace — the thermostat goes blank, the system ignores heat calls, and there's no 24V at the control board. Transformers most often burn out from a shorted gas valve, a pinched or shorted thermostat wire, or a seized motor pulling excess current that overheats the windings.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177217 |
| Type | Step-Down Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 120V |
| Secondary Voltage | 24V |
| Fitment | OEM Direct Replacement |
Compatibility
Factory replacement for the ICP Tempstar Heil WFAR060A042A1 furnace and shared across many ICP-family gas furnaces and air handlers using a 120/24V 40VA control transformer. Verify your existing transformer's primary and secondary voltage match before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
- Access — Remove the furnace control/blower compartment service panel.
- Document — Photograph all primary (120V) and secondary (24V) wire connections before disconnecting.
- Remove — Disconnect the leads, unbolt the transformer from its bracket, and remove it.
- Install — Mount the new transformer and reconnect the primary and secondary leads exactly per your photo.
- Test — Restore power, confirm 24V across the secondary terminals, and verify the furnace responds to a heat call.
Signs You Need a Replacement
- Thermostat display is blank with line power present
- No 24V reading at the control board
- Furnace unresponsive to heat or fan calls
- Scorched, swollen, or burnt-smelling transformer
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days