ICP Transformer for WAPL244A2 — 40VA 208/230V to 24V Step-Down | Ships Today
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Overview
This is a genuine OEM 40VA control transformer (part number 1172028) for the ICP/Tempstar/Heil WAPL244A2 air handler. It steps 208/230V line voltage down to the 24V control voltage that powers the thermostat, contactor coil, relays, and low-voltage control circuit. When the transformer fails, the control system goes dead even though line voltage is still present. Typical symptoms include a blank or unresponsive thermostat, a no-start condition, a humming transformer, or a burnt smell near the control board. Because a shorted 24V circuit or a surge usually kills a transformer, find and fix the root cause before installing the new one.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172028 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fit | OEM Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP/Tempstar/Heil WAPL244A2 air handler. The 1172028 40VA transformer is shared across many related ICP-family air handlers and furnaces using the same 208/230V-to-24V control architecture. Confirm your existing transformer is rated 40VA with a 208/230V primary and 24V secondary before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching wiring.
- Access — Remove the service panel to expose the control box.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the primary (208/230V) and secondary (24V) leads, then unbolt the failed transformer from its bracket.
- Install — Mount the new transformer, reconnect the primary and secondary leads exactly per your photo, and verify tight connections.
- Test — Restore power, verify 24V at the secondary terminals, and confirm the thermostat and controls energize.
Signs You Need a Replacement
- Thermostat is blank or unresponsive while line voltage is present
- No 24V reading at the secondary terminals
- Transformer is hot, humming, or smells burnt
- Repeatedly blown low-voltage fuse or tripped control circuit
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