ICP 40VA Transformer for RHS048S0CB0AAA — 208/230V to 24V | Ships Today
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Overview
This OEM control transformer supplies the low-voltage 24V power that runs your ICP RHS048S0CB0AAA heat pump's control circuit — the contactor coil, reversing valve coil, defrost board, and thermostat. It steps down 208/230V line voltage to a stable 24V secondary at 40VA. When a transformer fails, the entire control circuit goes dead: the system won't respond to the thermostat, the contactor won't pull in, and the compressor and fan never start, even though line power is present. A buzzing transformer, a blown low-voltage fuse that keeps reopening, or zero volts on the secondary terminals all point to a failed unit.
Specifications
| Spec | Value |
|---|---|
| OEM Part Numbers | 1178205, 1175367 |
| Type | Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fitment | OEM Replacement |
Compatibility
Engineered as a direct OEM replacement for the ICP / Tempstar / Heil RHS048S0CB0AAA 4-ton heat pump and other RHS-series condensing units that use a 40VA 24V control circuit. Always confirm primary and secondary voltage against 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 at the contactor.
- Access — Remove the condenser service panel to reach the control compartment.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the leads, then unbolt the old transformer from its bracket.
- Install — Mount the new transformer, wire the 208/230V primary and 24V secondary exactly per your photo.
- Test — Restore power and confirm 24V across the secondary terminals and proper system operation.
Signs You Need a Replacement
- No 24V at the secondary terminals with line voltage present
- Repeatedly blown low-voltage fuse or tripped board fuse
- Audible buzzing or burning smell from the transformer
- Contactor and reversing valve coil won't energize on a call for cooling
Shipping & Returns
Ships same day on orders placed 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