ICP 40VA Transformer for WJA336000KTP0A2 — 208/230V to 24V | Ships Today
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Overview
This is the OEM 24V control transformer kit for the ICP / Tempstar / Heil WJA336000KTP0A2 furnace, including the 40VA step-down transformer (part 1173691) and the matching 24V terminal barrier (part 1176032). The transformer steps line voltage of 208/230V down to 24V to power the thermostat, control board, gas valve, contactor coil, and other low-voltage components. When a transformer fails, the entire 24V control circuit goes dead — no heating or cooling call will be answered even though line power is present. Common failure causes are a shorted thermostat wire, a seized contactor or gas valve coil overloading the secondary, or simple age-related winding breakdown.
Specifications
| Spec | Value |
|---|---|
| Transformer Part Number | 1173691 |
| Barrier Part Number | 1176032 |
| Type | Control Transformer |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
Compatibility
Engineered for the ICP family WJA336000KTP0A2 furnace and other Tempstar, Heil, and Comfortmaker units using the 1173691 transformer. Always confirm the OEM part number stamped on your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage at the unit with a multimeter.
- Access — Remove the blower/control compartment service panel.
- Document — Photograph all primary and secondary leads before disconnecting.
- Remove — Unscrew the old transformer and 24V barrier from the panel and disconnect the line and low-voltage leads.
- Install — Mount the new transformer and barrier, then reconnect the 208/230V primary and 24V secondary leads per your photo.
- Test — Restore power and confirm 24V across the secondary with a meter, then verify a thermostat call energizes the system.
Signs You Need a Replacement
- No 24V at the control board or thermostat with line power present
- System completely unresponsive to heating or cooling calls
- Burnt smell or visibly scorched transformer windings
- Repeatedly blown low-voltage fuse after a fresh fuse is installed
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. 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