ICP 40VA Transformer for WJA348000K000A2 — 208/230V to 24V | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This is a genuine OEM 40VA control transformer (part number 1173691) with its matching terminal barrier (part number 1176032) for the ICP / Heil / Tempstar model WJA348000K000A2. The transformer steps the 208/230V line voltage down to the 24V that powers the thermostat, contactor coil, control board, and safety switches. It is the foundation of the low-voltage control circuit — if it fails, the entire control system goes dead. Common failure symptoms include a blank thermostat, no 24V at the control board, a unit that ignores cooling calls, or a transformer that has overheated, hummed loudly, or burned open following a control-wire short. The included barrier protects and isolates the secondary terminals to keep low-voltage wiring safe and tidy.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (Transformer), 1176032 (Barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP / Heil / Tempstar / Comfortmaker |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fitment | OEM Replacement |
Compatibility
Engineered as a direct OEM replacement for ICP-family model WJA348000K000A2 and shared platform units under the Heil, Tempstar, Comfortmaker, and Arcoaire brands. Verify the original is a 40VA, 208/230V-to-24V transformer before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the unit service panel to reach the control area.
- Document — Photograph the primary (line) and secondary (24V) wire connections before disconnecting.
- Remove — Disconnect the primary and secondary leads and remove the transformer mounting screws.
- Install — Mount the new transformer with its barrier, then reconnect the primary and 24V secondary wires per your photo.
- Test — Restore power and confirm 24V across the secondary and a normal cooling response.
Signs You Need a Replacement
- Thermostat is blank or dead with line power present.
- No 24V output measured across the secondary terminals.
- Transformer is hot, humming loudly, or smells burnt.
- Unit won't respond to a heat or cool call.
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