ICP Transformer for WAHM244A1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM 40VA control transformer (part number 1172028) steps 208/230V line voltage down to the 24V control voltage that runs your ICP WAHM244A1 air handler's thermostat, control board, relays, and contactor coils. When a transformer fails, the entire low-voltage control circuit goes dead: the thermostat screen goes blank, the blower won't start, and there is no 24V present at the control board. A buzzing transformer, a tripped or open internal fuse link, or a scorched smell at the control box are common signs the original unit has burned out from a shorted control wire or a failed component downstream.
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
Designed as a direct-fit replacement for the ICP / Tempstar / Heil WAHM244A1 air handler. The 40VA, 208/230V-to-24V configuration is also shared across many ICP-family fan coil and air handler models, but always verify the original part number 1172028 before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage at the unit with a multimeter before touching any wiring.
- Access — Remove the air handler's electrical access panel to expose the control box.
- Document — Photograph the primary and secondary lead connections before disconnecting anything.
- Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the transformer from the control panel bracket.
- Install — Mount the new transformer, match the 208/230V taps and 24V leads exactly to your photo, and confirm tight connections.
- Test — Restore power and confirm 24V across the secondary terminals and a powered-up thermostat.
Signs You Need a Replacement
- Blank thermostat and a completely dead low-voltage control circuit
- No 24V reading at the control board or thermostat terminals
- Buzzing, humming, or burnt smell coming from the transformer
- Repeated blown control fuses after a recent short
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