ICP 40VA Transformer for WJA448000KTP0A1 — 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part 1173691) is a direct replacement for ICP, Tempstar, and Heil model WJA448000KTP0A1. It steps line voltage of 208/230V down to the 24V control voltage required to power the contactor coil, control board, and low-voltage circuits in your heat pump or condensing unit. Rated at 40VA, it delivers stable, regulated power to the unit's safety and control devices. This kit also includes the matching 24V barrier (part 1176032) for safe, code-compliant low-voltage wire separation. When a transformer fails — typically from a power surge, a shorted control wire, or a stuck contactor drawing excess current — the entire low-voltage control system goes dead: the unit won't start, the thermostat may go blank, and no 24V is present at the contactor.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer), 1176032 (barrier) |
| Type | Control / Step-Down Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 V |
| Secondary Voltage | 24 V |
| Fitment | OEM |
Compatibility
Engineered for ICP, Tempstar, Heil, and Comfortmaker model WJA448000KTP0A1 and related platform units using a 208/230V to 24V control circuit. Confirm your unit's existing transformer is rated 40VA with a 208/230V primary before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and disconnect switch, then verify zero voltage with a multimeter.
- Access — Remove the control panel service cover.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the old transformer from the panel.
- Install — Mount the new transformer, install the barrier, and reconnect each wire exactly per your photo.
- Test — Restore power and confirm 24V across the secondary terminals and proper unit startup.
Signs You Need a Replacement
- No 24V at the contactor or control board, unit completely dead
- Blown low-voltage fuse or repeatedly tripping control circuit
- Blank or unpowered thermostat with line voltage present
- Burnt smell or visibly scorched transformer housing
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