ICP 40VA Transformer for WJH336000K000A1 — 208/230V to 24V | Ships Today
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Overview
This is the OEM 40VA control transformer (part #1173691) for the ICP / Heil / Tempstar WJH336000K000A1 packaged heat pump. It steps the unit's 208/230V line voltage down to the 24V low-voltage control circuit that powers the thermostat, contactor coil, and reversing-valve solenoid. This listing also covers the related low-voltage control components shipped for this model: the 24V reversing-valve coil (#1172619), the reversing valve with coil (#1173708), and the 24V barrier (#1176032). When the transformer fails, the entire 24V control side goes dead — no contactor pull-in, no compressor, no fan. Common failure causes are a shorted secondary, a seized contactor coil that overloads the transformer, or age-related winding breakdown.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer) |
| Type | Control Transformer |
| Brand | ICP / Heil / Tempstar |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Related Parts | 1176032, 1172619, 1173708 |
Compatibility
Engineered for the ICP-family WJH336000K000A1 packaged heat pump and shared across Heil, Tempstar, and Comfortmaker units that use this control platform. Always confirm the printed primary/secondary voltage and VA rating against your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter at the unit.
- Access — Remove the control-panel service panel.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Disconnect the primary and secondary leads, then unbolt the failed transformer from the panel.
- Install — Mount the new transformer, match the primary taps to your supply voltage, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24V at the secondary and proper contactor pull-in.
Signs You Need a Replacement
- No 24V at the thermostat or control board
- Contactor will not pull in and compressor never starts
- Visible scorching, bulging, or a burnt smell at the transformer
- Repeatedly blown low-voltage fuse traced to the transformer secondary
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