What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121SFBA0AAAA — 24V Coil | Ships Today is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your ICP equipment which lists the model number RGS121SFBA0AAAA — 24V Coil | Ships Today.

My AC clicks but the compressor does not turn on. What is wrong?

Clicking from the outdoor unit without the compressor starting usually means a worn contactor. The contactor is the relay that sends power to the compressor. When its contacts are pitted or worn, it clicks but cannot establish a solid electrical connection. Other symptoms: visible pitting or burn marks on the contactor face, AC works intermittently, or buzzing from the contactor.

ICP

ICP 2-Pole 30A Contactor for RGS121SFBA0AAAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121SFBA0AAAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 26.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM 2-pole, 30-amp definite-purpose contactor (part 1178074) uses a 24-volt control coil to switch line voltage to the compressor and condenser fan. When the thermostat calls for cooling, the 24V coil energizes and pulls the contacts closed, sending power to the outdoor unit. Over thousands of cycles the contacts pit, burn, or weld, and the coil can fail open — causing a unit that won't start, chatters, or won't shut off. A genuine 30A 24V contactor restores reliable, clean switching and protects the compressor from low-voltage and short-cycling damage.

Specifications

Spec	Value
Part Number	1178074
Type	Definite-purpose contactor, 2-pole
Brand	ICP / Heil / Tempstar / Comfortmaker
Contact Rating	30 Amps
Poles	2
Coil Voltage	24 VAC
Fitment	OEM

Compatibility

Fits the ICP/Tempstar/Heil RGS121SFBA0AAAA and other systems specifying a 2-pole, 30A, 24V coil definite-purpose contactor. Confirm pole count, amp rating, and coil voltage against your existing part.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the electrical access panel on the unit.
Document — Photograph all line, load, and coil wiring before disconnecting.
Remove — Transfer one wire at a time, or label leads, then unbolt the old contactor.
Install — Mount the new contactor and reconnect L1/L2, compressor/fan loads, and the 24V coil leads per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the unit runs.

Signs You Need a Replacement

Pitted, burned, or welded contacts
Loud chatter or buzzing when energized
Outdoor unit won't start or won't shut off
Open or burned 24V coil reads no continuity

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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

ICP 2-Pole 30A Contactor for RGS...

$26.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121SFBA0AAAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121SFBA0AAAA — 24V Coil | Ships Today. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.

How do I replace the contactor on my ICP RGS121SFBA0AAAA — 24V Coil | Ships Today?

Difficulty: Medium (30–45 min)
Step 1: Turn off breaker. Step 2: Open condensing unit panel. Step 3: Photograph ALL wiring on the contactor. Step 4: Label each wire with tape. Step 5: Disconnect wires and remove old contactor. Step 6: Mount new contactor, reconnect wires matching your photo. Step 7: Restore power and test.

My AC clicks but the compressor won’t turn on. What’s wrong?

Clicking from the outdoor unit without the compressor starting = worn contactor. The contactor sends power to the compressor. When its contacts are pitted, it clicks but can’t make solid contact. Look for: visible pitting/burn marks on the contactor face, intermittent operation, or buzzing.

Is this contactor compatible with Bryant or Payne too?

Many ICP parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.

Should I use OEM or aftermarket for my ICP contactor?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

How fast does National HVAC Parts ship?

Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.

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