ICP 2-Pole Contactor for RGS121HFAB0AAAA — 30A / 40A 24V Coil | Ships Today
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Overview
This is the genuine OEM 2-pole definite purpose contactor for the ICP / Heil / Tempstar RGS121HFAB0AAAA system, available in 30 amp (part 1178074) and 40 amp (part 1178211) ratings, both with a 24-volt control coil. The contactor is the electrically controlled switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. When the 24V coil is energized, the magnetic field pulls the contacts closed and delivers line voltage to the load; when the call ends, the contacts open. Pitted, welded, or chattering contacts are one of the most common HVAC failures and cause no-cool calls, hard starts, and buzzing at the unit.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1178074 (30A), 1178211 (40A) |
| Type | Definite Purpose Contactor |
| Poles | 2-Pole |
| Contact Rating | 30A / 40A |
| Coil Voltage | 24V |
| Brand | ICP (Heil / Tempstar / Comfortmaker) |
| Fits Model | RGS121HFAB0AAAA |
Compatibility
Fits the ICP/Heil/Tempstar RGS121HFAB0AAAA and other units on the same platform that use a 2-pole, 24V-coil contactor. Match the amperage (30A or 40A) and terminal layout to your original before installing.
Installation Guide
- Safety First — Disconnect power at the unit disconnect and breaker. Verify zero voltage with a multimeter across the line terminals.
- Access — Remove the electrical service panel on the condensing unit.
- Document — Photograph every wire on the line, load, and coil terminals before disconnecting.
- Remove — Label and remove the wires, then unscrew the old contactor from its mounting.
- Install — Mount the new contactor, transfer the wires terminal-for-terminal per your photo, and confirm the coil leads are on the 24V terminals.
- Test — Restore power, call for cooling, and confirm the contacts pull in cleanly with no chatter and correct compressor/fan operation.
Signs You Need a Replacement
- Loud buzzing or chattering at the contactor when cooling is called
- Burned, pitted, or welded contacts that stick closed or fail to close
- Compressor and fan won't start even with a good 24V signal
- Visible arcing, melted housing, or ants/debris fouling the contacts
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