ICP Transformer for WFEL045A036A1 — 40VA 120/24V OEM | Ships Today
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Overview
This 40VA control transformer (OEM part number 1177217) is the factory replacement for the ICP/Tempstar/Heil WFEL045A036A1. The transformer steps line voltage (120V) down to the 24V control voltage that powers the thermostat, control board, gas valve, relays, and contactor. When the transformer fails, the entire low-voltage control circuit goes dead — the thermostat screen blanks, nothing energizes, and the system will not respond to a call for heat or cool. Transformers commonly burn out from a 24V short, a seized component drawing excess current, or a power surge. This OEM-spec unit is rated at 40VA with a 120V primary and 24V secondary to match the original.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1177217 |
| Type | Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 120V |
| Secondary Voltage | 24V |
| Fits Model | WFEL045A036A1 |
Compatibility
Engineered as the OEM replacement for the ICP/Tempstar/Heil WFEL045A036A1 air handler. Verify the primary voltage (120V), secondary voltage (24V), and VA rating against your existing transformer before installing. This is the factory-matched control transformer for that model.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter on both primary and secondary leads.
- Access — Remove the control compartment service panel.
- Document — Photograph the primary and secondary wire connections before disconnecting.
- Remove — Disconnect the leads, then unscrew or unclip the transformer from its mounting bracket.
- Install — Mount the new transformer, land the 120V primary and 24V secondary leads exactly per your photo, and confirm no bare conductors touch the cabinet.
- Test — Restore power and confirm 24V across the secondary and a live thermostat display.
Signs You Need a Replacement
- Blank thermostat or completely dead low-voltage controls
- No 24V reading across the secondary terminals
- Burnt smell or visibly scorched transformer body
- Repeated control-circuit failures after a short was cleared
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