ICP 40VA Transformer for WJH324000K000A1 — 208/230V to 24V | Ships Today
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Overview
This OEM 40VA Transformer (Part #1173691) steps the 208/230V line voltage in your ICP / Heil / Tempstar WJH324000K000A1 heat pump down to the 24V control voltage that powers the contactor coil, reversing valve solenoid, and low-voltage thermostat circuit. Rated at 40VA, it supplies enough current to energize the unit's 24V loads — including the reversing valve coil (OEM 1172619) and barrier (1176032) used in this heat pump — without overheating. When a transformer fails, the entire low-voltage side goes dead: the contactor won't pull in, the compressor and condenser fan never start, and the thermostat may lose power. A buzzing, scorched, or open transformer is a common no-cool / no-heat callback, and replacing it with the correct 40VA OEM unit restores reliable control power.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 |
| Type | Step-Down Control Transformer |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Rating | 40 VA |
| Primary Voltage | 208 / 230 VAC |
| Secondary Voltage | 24 VAC |
| Fits Model | WJH324000K000A1 |
| Related Parts | 1176032 Barrier 24V, 1172619 Reversing Valve Coil 24V, 1173715 Reversing Valve w/Coil |
Compatibility
Fits the ICP / Heil / Tempstar WJH324000K000A1 heat pump and other International Comfort Products units calling for a 40VA 208/230V-to-24V transformer (part 1173691). Verify the primary/secondary voltages and VA rating against your wiring diagram before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and the outdoor disconnect, then verify zero voltage at the transformer leads with a multimeter.
- Access — Remove the condenser control panel to reach the transformer.
- Document — Photograph every primary and secondary lead before disconnecting.
- Remove — Disconnect the line-voltage primary and 24V secondary wires, then unbolt the failed transformer from the panel.
- Install — Mount the new 40VA transformer, wire the 208/230V primary and 24V secondary exactly per your photo.
- Test — Restore power and confirm 24VAC at the secondary and that the contactor pulls in on a call for cooling or heating.
Signs You Need a Replacement
- No 24V control voltage — contactor and reversing valve do not energize
- Audible buzzing or humming from the transformer
- Burnt smell or scorched/discolored transformer housing
- Repeatedly tripping the low-voltage fuse or blank thermostat
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