ICP 40VA Transformer 208/230V to 24V for WJA360000KTP0A1 — With Barrier | Ships Today
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Overview
This OEM control transformer (part #1173691) with its 24V barrier (part #1176032) is the genuine replacement set for ICP/Tempstar/Heil model WJA360000KTP0A1. The transformer steps the incoming 208/230-volt line down to the 24-volt control voltage that powers the thermostat, contactor coil, control board, and safety circuits. Rated at 40VA, it supplies enough current for the full low-voltage control chain. When a transformer fails — usually from a shorted control wire or an overloaded coil — the entire system goes dead: no thermostat display, no contactor pull-in, no call for cooling or heat. The included barrier protects and isolates the 24V secondary terminals.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (transformer), 1176032 (24V barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 208 / 230V |
| Secondary Voltage | 24V |
Compatibility
Directly fits ICP, Tempstar, Heil, Comfortmaker, and Arcoaire equipment using OEM parts 1173691 and 1176032, including model WJA360000KTP0A1. Confirm your existing transformer is a 40VA, 208/230-to-24V step-down unit before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter on both primary and secondary.
- Access — Remove the service/control panel.
- Document — Photograph the primary (line) and secondary (24V) wiring before disconnecting.
- Remove — Disconnect the leads, unbolt the old transformer, and remove the barrier.
- Install — Mount the new transformer and barrier, then reconnect primary and secondary leads per your photo, matching the correct 208/230V primary tap.
- Test — Restore power and confirm 24V across the secondary and normal thermostat/control operation.
Signs You Need a Replacement
- Blank thermostat and completely dead control circuit
- No 24V measured across the secondary terminals
- Repeated blown control fuses or a burnt-smelling transformer
- Contactor and control board fail to energize on a 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