ICP 40VA Transformer for WJH348000K000A1 — 208/230V to 24V | Ships Today
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Overview
This OEM 40VA control transformer (part #1173691) steps 208/230V line voltage down to 24V to power the low-voltage control circuit on your ICP Tempstar Heil WJH348000K000A1 heat pump. The 24V output feeds the contactor coil, reversing valve coil, and other control components. This combo listing also covers the reversing valve coil (1172619), reversing valve with coil (1172618), and 24V barrier (1176032) used in the same control assembly. When a transformer fails, the entire low-voltage control system loses power — the unit will not respond to thermostat calls, the contactor will not pull in, and the system goes dead despite line voltage being present.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (TRANS 208/230>24 40VA) |
| Related Parts | 1176032, 1172619, 1172618 |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
Compatibility
Engineered as a direct OEM fit for the ICP Tempstar Heil WJH348000K000A1 heat pump and shared ICP family platforms (Comfortmaker, Arcoaire) that use the same 40VA 208/230V-to-24V control circuit. Always confirm your unit's voltage rating before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the transformer terminals.
- Access — Remove the control panel access cover.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the leads, then unbolt the failed transformer from its mounting bracket.
- Install — Mount the new transformer, match the 208/230V primary leads and 24V secondary leads exactly per your photo.
- Test — Restore power and confirm 24V across the secondary with a multimeter, then verify the contactor energizes on a thermostat call.
Signs You Need a Replacement
- No 24V at the control board or thermostat with line voltage present
- Contactor and reversing valve coil fail to energize
- Blown low-voltage fuse that re-blows immediately
- Burnt smell or visibly charred transformer windings
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