ICP 40VA Transformer for WJH324000KTP0A2 — 208/230V to 24V Heat Pump Control | Ships Today
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Overview
This is the OEM 40VA control transformer (part #1173691) for the ICP/Heil/Tempstar WJH324000KTP0A2 heat pump. It steps line voltage (208/230V) down to the 24V control voltage that powers the thermostat circuit, contactor coil, reversing-valve solenoid, and defrost board. When this transformer fails, the entire low-voltage control system loses power — the unit won't respond to the thermostat even with line voltage present. Typical symptoms include a dead/unresponsive system, a repeatedly blown 24V fuse, a buzzing or scorched transformer, or 0 volts across the secondary terminals. The 40VA rating supplies adequate headroom for the reversing-valve coil and contactor loads on this heat pump.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 |
| Type | Control Transformer |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40 VA |
| Associated Parts | 1176032 Barrier 24V, 1172619 Rev-Valve Coil 24V, 1173715 Reversing Valve w/Coil 24V |
Compatibility
Fits the ICP/Heil/Tempstar/Comfortmaker WJH324000KTP0A2 heat pump and other units in this platform using a 208/230V-to-24V 40VA control transformer. Always confirm primary/secondary voltage and VA rating against the unit being serviced.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
- Access — Remove the control-panel service panel.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from the bracket.
- Install — Mount the new transformer and connect the primary leads to the matching line voltage (208/230V) and the secondary leads to the 24V control terminals per your photo.
- Test — Restore power and confirm 24–28V across the R and C terminals; verify the system responds to a thermostat call.
Signs You Need a Replacement
- No 24V control power / system completely unresponsive to the thermostat
- Repeatedly blown 24V control fuse
- Buzzing, overheating, or burnt-smelling transformer
- 0V measured across the secondary (R–C) with line voltage present at the primary
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