ICP 40VA Transformer for WJA324000KTP0A1 – 208/230V to 24V | Ships Today
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Overview
This OEM 40VA control transformer kit (part 1173691 transformer with 1176032 24V barrier) supplies low-voltage power for the ICP / Tempstar / Heil WJA324000KTP0A1 unit. It steps the 208/230V line voltage down to the 24V control voltage that runs the contactor coil, control board, and thermostat circuit. When a control transformer fails, the entire low-voltage side of the system goes dead — the thermostat screen may be blank, the contactor will not pull in, and the unit will not start even though line voltage is present. The included 24V barrier protects and isolates the secondary terminals. A 40VA rating provides the current needed to drive the unit's contactor and control circuit reliably.
Specifications
| Spec | Value |
|---|---|
| Transformer Part Number | 1173691 |
| Barrier Part Number | 1176032 (Barrier, 24V) |
| Type | Control / Class 2 step-down transformer |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 V |
| Secondary Voltage | 24 V |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Fitment | OEM Genuine Replacement |
Compatibility
Factory-correct low-voltage transformer and barrier for the ICP unit WJA324000KTP0A1 and related Tempstar, Heil, and Comfortmaker models using a 208/230V to 24V, 40VA control circuit. Verify your model and serial number on the rating plate before ordering.
Installation Guide
- Safety First – Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter on both line and 24V circuits.
- Access – Remove the control/electrical service panel.
- Document – Photograph all primary and secondary wiring before disconnecting anything.
- Remove – Disconnect the primary (line) and secondary (24V) leads, then unbolt the failed transformer and barrier from the mounting bracket.
- Install – Mount the new transformer, fit the 24V barrier, and reconnect the primary to matching line voltage and the secondary to the 24V circuit per your photo.
- Test – Restore power and confirm 24V across the secondary, then verify the contactor pulls in and the unit starts.
Signs You Need a Replacement
- No 24V at the control board, thermostat, or contactor coil
- Blank thermostat and a unit that will not start despite line voltage
- Tripped or blown low-voltage fuse that fails again after reset
- Burnt smell, swollen housing, or zero output measured across the secondary
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