ICP 40VA Transformer for WJA330000KTP0A2 — 208/230V to 24V with Barrier | Ships Today
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Overview
This genuine OEM control transformer (part number 1173691) steps the incoming 208/230V line voltage down to the 24V control voltage required by the ICP / Tempstar / Heil WJA330000KTP0A2 system, and ships with the matching 24V barrier (part number 1176032) that protects and isolates the low-voltage terminals. Rated at 40VA, this transformer powers the thermostat, contactor coil, control board, and other 24V accessories. When a control transformer fails, the entire low-voltage circuit goes dead — you will see a blank thermostat, a system that will not respond to any call, no 24V at the control board, or a transformer that is overheated, buzzing, or has a burned smell. A blown transformer is frequently the result of a shorted low-voltage wire or a failed downstream component, so inspect the 24V circuit for shorts before energizing the replacement.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (Transformer), 1176032 (24V Barrier) |
| Type | Control Transformer with Barrier |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fitment | OEM Replacement |
Compatibility
Fits the ICP, Tempstar, Heil, Comfortmaker, and Arcoaire WJA330000KTP0A2 unit and related ICP-family systems that use a 40VA 208/230V-to-24V control transformer. Confirm your primary voltage, secondary voltage, and VA rating match before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter before servicing.
- Access — Remove the control/electrical access panel.
- Document — Photograph the primary (line) and secondary (24V) leads and the barrier position before disconnecting.
- Remove — Disconnect the primary and secondary leads, then unbolt the old transformer and barrier from the panel.
- Install — Mount the new transformer and barrier, match the primary taps to your supply voltage, and reconnect each lead per your photo.
- Test — Restore power, confirm 24V at the secondary, and verify the thermostat and controls respond.
Signs You Need a Replacement
- Blank thermostat and no system response to any call
- No 24V measured at the control board or transformer secondary
- Transformer is hot to the touch, buzzing, or smells burned
- Repeatedly blown low-voltage fuse after a circuit 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