ICP Transformer for WAHT364B1 — 40VA 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part number 1172028) steps 208/230V line voltage down to the 24V control voltage that powers the thermostat, relays, and control board in the ICP WAHT364B1 air handler. Rated at 40VA, it supplies enough current to energize the low-voltage circuit and any connected accessories. A failed transformer is one of the most common causes of a completely dead control system: no 24V means the thermostat goes blank, contactors and relays will not pull in, and nothing on the unit responds. Transformers fail from voltage spikes, shorted thermostat wiring, or simple age-related winding breakdown, often leaving scorch marks or a burnt-electrical smell. This genuine OEM part restores reliable 24V control power.
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 |
| Fitment | OEM Replacement |
Compatibility
Direct OEM fit for the ICP WAHT364B1 air handler and the equivalent Tempstar, Heil, and Comfortmaker units built on the same platform. Verify the 1172028 part number and the 208/230V-to-24V, 40VA rating against your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter on both the line and low-voltage sides.
- Access — Remove the control/electrical compartment service panel.
- Document — Photograph the primary and secondary lead connections before disconnecting them.
- Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the transformer from its mounting bracket.
- Install — Mount the new transformer, match the primary taps to your incoming voltage (208 or 230), and reconnect all leads per your photo.
- Test — Restore power and confirm 24V across the secondary terminals; verify the thermostat and controls power up.
Signs You Need a Replacement
- Blank thermostat and completely dead control system
- No 24V reading across the secondary terminals
- Burnt smell or visible scorching on the transformer body
- Repeated blown low-voltage fuse after a wiring 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