ICP Transformer for RHS183H0CA0AAAA — 24V 40VA Control | Ships Today
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Overview
This OEM 24V transformer and control package supplies the low-voltage power that runs every command in your ICP RHS183H0CA0AAAA heat pump. The 40VA transformer steps line voltage down to the 24V needed by the thermostat, contactor coils, and reversing valve solenoid. The kit pairs the reversing-valve coil (part 1172619) with the DPDT (1183814) and DPST (1178205) control relays that switch the unit between heating and cooling. When the transformer fails, the entire control circuit goes dead — no thermostat call reaches the outdoor unit, the contactor will not pull in, and the system simply will not start. A buzzing transformer, a tripped low-voltage fuse, or melted secondary wiring are classic signs the original component has shorted or overheated.
Specifications
| Spec | Value |
|---|---|
| OEM Part Numbers | 1172619, 1183814, 1178205 |
| Type | Control Transformer + Relay Set |
| Brand | ICP / Heil / Tempstar / Comfortmaker |
| Secondary Voltage | 24V |
| Rating | 40 VA |
| Relays | DPDT (T92S11A22-24), DPST (T92P7A22-24) |
| Reversing Valve Coil | 24V |
| Fit | Direct OEM Replacement |
Compatibility
Engineered as a direct replacement for the ICP RHS183H0CA0AAAA heat pump and the shared family of ICP-built systems sold under the Heil, Tempstar, and Comfortmaker labels using these same 24V control components. Always confirm the part numbers stamped on your original transformer and relays before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the contactor terminals with a multimeter.
- Access — Remove the control-panel service cover on the outdoor unit.
- Document — Photograph every low-voltage wire and its terminal before disconnecting anything.
- Remove — Label and disconnect the primary and secondary leads, unscrew the transformer bracket, and unplug the relay sockets and reversing-valve coil connector.
- Install — Mount the new transformer, seat the relays, connect the reversing-valve coil, and reconnect each wire exactly per your photo.
- Test — Restore power, confirm 24V at the secondary, and verify the contactor pulls in on a thermostat call.
Signs You Need a Replacement
- System completely dead with no response to a thermostat call
- Repeatedly blown 3-amp low-voltage fuse
- Audible buzzing or burning smell from the control box
- Heat pump fails to switch between heating and cooling
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