ICP 40VA Transformer for WAXT484A2 — 208/230V to 24V | Ships Today
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Overview
This genuine OEM control transformer (part number 1172028) is the replacement for the ICP / Tempstar / Heil WAXT484A2. The transformer steps the incoming 208/230-volt line voltage down to the 24-volt control voltage that powers your thermostat, contactor coil, relays, and control board. It is rated at 40VA, providing enough capacity to drive the standard low-voltage control circuit. When a transformer fails — usually from a shorted thermostat wire, a stuck contactor drawing excessive current, or simple age — the entire 24V control system goes dead: the thermostat screen blanks, the contactor will not pull in, and the system will not respond to any call for heating or cooling.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1172028 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230 VAC |
| Secondary Voltage | 24 VAC |
| Fits Model | WAXT484A2 |
Compatibility
Direct OEM replacement for the ICP, Tempstar, Heil, and Comfortmaker WAXT484A2. A 40VA 208/230-to-24V transformer of this configuration is widely used across residential condensing units and air handlers, but confirm your existing transformer's VA rating and primary/secondary voltages before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect. Verify zero voltage at the transformer primary leads with a multimeter.
- Access — Remove the service or control panel to reach the transformer and its wiring.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the old transformer.
- Install — Mount the new transformer, matching the 208/230V primary taps to the line voltage and reconnecting the 24V secondary per your photo.
- Test — Restore power and measure 24 VAC across the secondary terminals, then confirm the thermostat and contactor respond.
Signs You Need a Replacement
- Blank thermostat and no 24V control power
- Contactor and relays will not energize
- No 24 VAC reading across the secondary terminals
- Burnt smell, discoloration, or a tripped/blown low-voltage fuse
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