ICP Transformer for WJA348000K000A1 — 40VA 208/230 to 24V | Ships Today
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Overview
This is the OEM control transformer assembly for the ICP / Tempstar / Heil WJA348000K000A1 system, covering OEM part numbers 1173691 (TRANS 208/230>24 40VA) and 1176032 (BARRIER 24V). The transformer steps the incoming 208/230V line voltage down to the 24V control voltage that powers your thermostat, contactor coil, and safety circuits. When it fails, the entire low-voltage control system goes dead — no call for cooling reaches the contactor, even though high-voltage power is present at the unit. The included 24V barrier protects and isolates the low-voltage terminals. Rated at 40VA, it provides ample capacity for the contactor and control loads on this equipment.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1173691 (transformer), 1176032 (24V barrier) |
| Type | Control Transformer |
| Brand | ICP / Tempstar / Heil |
| VA Rating | 40VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fitment | OEM direct replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil model WJA348000K000A1. The 40VA 208/230-to-24V transformer is also used across many comparable ICP-family condensing units and heat pumps that share the same control platform. Always confirm your existing transformer's VA rating and primary/secondary voltages before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the unit with a multimeter.
- Access — Remove the control-panel access cover to expose the transformer and low-voltage terminal block.
- Document — Photograph every primary and secondary lead before disconnecting anything.
- Remove — Note the primary tap in use (208 vs. 230), disconnect the leads, and unbolt the failed transformer and barrier from the panel.
- Install — Mount the new transformer and 24V barrier, land the primary on the matching voltage tap, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24V at the secondary and a proper call for cooling at the contactor.
Signs You Need a Replacement
- No 24V at the secondary terminals while 208/230V is present at the primary.
- Thermostat is dead or unresponsive with high-voltage power confirmed at the unit.
- Contactor will not pull in on a call for cooling.
- Burnt smell, scorched windings, or a tripped internal fuse on the transformer.
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