What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121SRAA0AAAA — 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 RGS121SRAA0AAAA — 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 RGS121SRAA0AAAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121SRAA0AAAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 34.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM 2-pole definite-purpose contactor (part #1178074) is the electromechanical switch that energizes the compressor and condenser fan motor in your ICP/Tempstar/Heil RGS121SRAA0AAAA furnace and matched cooling system. Rated for 30 amps per pole with a 24-volt control coil, it closes when the thermostat calls for cooling and opens when the call ends. Contactors are among the most common HVAC failure points: the contacts arc and pit with every cycle, eventually welding shut, chattering, or failing to pull in. Symptoms of a failing contactor include a system that won't start, a buzzing or humming sound at the outdoor unit, contacts that stick closed so the compressor never shuts off, or visible burning and pitting on the contact points.

Specifications

Spec	Value
OEM Part Number	1178074
Type	2-Pole Definite Purpose Contactor
Brand	ICP (Tempstar / Heil / Comfortmaker)
Contact Rating	30 Amps
Coil Voltage	24V
Poles	2

Compatibility

Direct-fit OEM replacement for the ICP/Tempstar/Heil RGS121SRAA0AAAA gas furnace platform and matched condensing units. Replaces ICP part number 1178074. Always confirm the amp rating and coil voltage of your existing contactor before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and the furnace, then verify zero voltage with a multimeter.
Access — Remove the service panel on the condensing unit.
Document — Photograph all line, load, and 24V coil wires before disconnecting.
Remove — Note wire positions, then transfer each wire one at a time, or label and disconnect all leads and unbolt the old contactor.
Install — Mount the new contactor and reconnect line, load, and coil wires per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly with no chatter.

Signs You Need a Replacement

Outdoor unit hums or buzzes but the compressor won't start
Pitted, burned, or welded contact points
Compressor runs continuously because contacts are stuck closed
Chattering or intermittent operation 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

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

$34.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121SRAA0AAAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121SRAA0AAAA — 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 RGS121SRAA0AAAA — 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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