ICP Transformer for WAHL304B1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part number 1172028) is the power-supply heart of your ICP WAHL304B1 system. It steps down line voltage of 208/230V to the 24V control voltage required to operate thermostats, relays, contactors, and circuit boards. Rated at 40VA, it delivers the steady low-voltage power your control circuit depends on. When a transformer fails, the entire control system goes dark: the thermostat loses power, the blower won't energize, and the unit appears completely dead even though line voltage is present. A burnt smell, a tripped internal fuse, or zero reading on the secondary terminals are classic signs the transformer has shorted or burned out.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172028 |
| Type | Control Transformer |
| Brand | ICP |
| Rating | 40VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
Compatibility
Engineered as the OEM replacement for the ICP / Heil / Tempstar / Comfortmaker WAHL304B1 air handler. The dual-tap 208/230V primary makes it suitable for both common residential line-voltage supplies.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the service panel to expose the control compartment.
- Document — Photograph all primary and secondary wire connections before disconnecting anything.
- Remove — Disconnect the line-voltage leads and the 24V secondary leads, then unbolt the failed transformer from its bracket.
- Install — Mount the new transformer, matching the correct primary tap (208V or 230V) to your supply, and reconnect each wire per your photo.
- Test — Restore power and confirm 24V across the secondary terminals; the control system should energize.
Signs You Need a Replacement
- No 24V control power — thermostat and blower completely dead
- Burnt smell or visible scorching on the transformer body
- Internal fuse or breaker repeatedly tripping
- Zero or fluctuating voltage reading on the secondary terminals
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