ICP 2-Pole 30A 24V Contactor for RGS121SFAB0AAAA — Definite Purpose | Ships Today
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Overview
This is the genuine OEM 2-pole, 30-amp definite purpose contactor (part 1178074) with a 24-volt coil for the ICP / Tempstar / Heil RGS121SFAB0AAAA system. The contactor is the electrically operated switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. When the 24V coil is energized, the electromagnet pulls the contacts closed and sends line voltage to the load; when the call ends, a spring opens them. Contactors are a frequent failure point because their contacts arc and pit with every cycle. Pitted, welded, or chattering contacts cause hard starts, buzzing, or a unit that won't shut off — and welded contacts can keep a compressor running continuously. Replacing the contactor restores clean, reliable switching.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1178074 |
| Type | Definite Purpose Contactor |
| Brand | ICP / Tempstar / Heil |
| Poles | 2-Pole |
| Contact Rating | 30 Amps |
| Coil Voltage | 24 VAC |
| Application | AC compressor & condenser fan switching |
Compatibility
Fits the ICP-family RGS121SFAB0AAAA and other Tempstar, Heil, and Comfortmaker units specifying a 2-pole 30A contactor with a 24V coil. Verify pole count, amp rating, and coil voltage against your existing contactor before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker; verify zero voltage at the contactor line terminals with a multimeter.
- Access — Remove the unit's electrical access panel.
- Document — Photo every wire and terminal position before disconnecting.
- Remove — Transfer wires one at a time, or label them, then unbolt the old contactor from the bracket.
- Install — Mount the new contactor, reconnect line, load, and 24V coil leads exactly per your photo.
- Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly with no chatter and the compressor/fan energize.
Signs You Need a Replacement
- Buzzing or chattering at the contactor when cooling is called
- Pitted, blackened, or welded contacts
- Compressor that won't start or won't shut off
- Visible arcing, melted housing, or burnt terminals
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