ICP Transformer for WPG4604115RKA1 — 208/230V to 24V 40VA | Ships Today
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Overview
This OEM control transformer (part 1173691) steps the incoming 208/230V line voltage down to the 24V control circuit that powers contactors, relays, and the thermostat on your ICP/Heil/Tempstar WPG4604115RKA1 heat pump. Rated at 40VA, it supplies enough power to energize the contactor coil and low-voltage controls simultaneously. A failed transformer is one of the most common causes of a completely dead control board: no 24V means the contactor never pulls in and the unit appears "dead" even though high-voltage power is present. Symptoms of failure include a blown low-voltage fuse, a buzzing or scorched-smelling transformer, no display on the thermostat, or a unit that will not respond to a call for cooling or heating. This kit also includes the matching 24V barrier (part 1178431) for a complete, code-correct low-voltage termination.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer) / 1178431 (24V barrier) |
| Type | Class 2 control transformer |
| Brand | ICP / Heil / Tempstar |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
| Fit | OEM direct replacement |
Compatibility
Engineered as a direct OEM fit for the ICP/Heil/Tempstar/Comfortmaker WPG4604115RKA1 and shares the same low-voltage platform as many sibling ICP package heat pumps using a 208/230V to 24V 40VA control transformer. Always verify the primary and secondary voltage stamped on your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and the unit disconnect, then verify zero voltage with a multimeter.
- Access — Remove the control-panel service panel to expose the transformer.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Tag and disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the transformer from the panel.
- Install — Mount the new transformer, reconnect primary to line voltage and secondary to the 24V circuit exactly per your photo.
- Test — Restore power and confirm 24V across the secondary terminals, then verify the contactor pulls in on a call.
Signs You Need a Replacement
- Repeatedly blown low-voltage (3A) fuse
- No 24V at the secondary with line voltage present
- Buzzing, overheating, or burnt-smelling transformer
- Thermostat blank and contactor will not engage
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