ICP Transformer for WAHM362A1 — 208/230V to 24V 40VA | Ships Today
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Overview
This OEM control transformer (part number 1172028) supplies the 24V power that runs your ICP WAHM362A1 air handler's control circuit — the thermostat, relays, and control board all depend on it. Rated at 40VA with a 208/230V primary and a 24V secondary, it converts line voltage down to the safe low voltage your controls need. When this transformer fails, the control side loses power entirely: the blower won't run, the thermostat may go blank, and the unit stops answering calls for heating or cooling. A failed transformer is among the most common reasons an air handler goes completely dead.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172028 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fits Model | WAHM362A1 |
Compatibility
Direct OEM replacement for the ICP WAHM362A1 air handler and shared across many Tempstar, Heil, and Comfortmaker fan-coil units using a 40VA 208/230-to-24V control transformer. Confirm your existing transformer's VA and voltage ratings before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the air handler's service panel to reach the control box.
- Document — Photograph all primary and secondary lead connections before disconnecting.
- Remove — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the failed transformer.
- Install — Mount the new transformer, matching the correct primary tap (208V or 230V) to your supply, and reconnect the secondary per your photo.
- Test — Restore power and confirm 24V across the secondary terminals and normal control operation.
Signs You Need a Replacement
- No 24V output at the secondary with line voltage present at the primary.
- System completely unresponsive — blank thermostat, no blower, no relay clicks.
- Visible scorching, melted housing, or a burnt smell at the transformer.
- Repeated blown control fuses from a shorted or overloaded 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