What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121SRBA0AAAA — 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 RGS121SRBA0AAAA — 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 RGS121SRBA0AAAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121SRBA0AAAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This is a genuine OEM 2-pole definite purpose contactor (part number 1178074) for the ICP/Tempstar/Heil RGS121SRBA0AAAA gas furnace and matched condensing unit. The contactor is the electromechanical switch that energizes the high-voltage circuit to the compressor and condenser fan motor whenever the 24-volt control circuit calls for cooling. It is rated for 30 amps per pole with a 24V coil. A failing contactor is one of the most common causes of an outdoor unit that will not start, that hums but does not run, or that chatters on and off. Burned, pitted, or welded contacts prevent clean power transfer, while a failed coil stops the contactor from pulling in at all.

Specifications

Spec	Value
Part Number	1178074
Type	2-Pole Definite Purpose Contactor
Brand	ICP (Tempstar / Heil / Comfortmaker)
Amp Rating	30A per pole
Coil Voltage	24V
Fits Model	RGS121SRBA0AAAA

Compatibility

Engineered as the factory replacement for the ICP RGS121SRBA0AAAA and a direct fit for many Tempstar, Heil, and Comfortmaker systems that share this 30A/24V 2-pole platform. Always confirm the amp rating, pole count, and coil voltage against the part you are replacing before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter at the contactor line terminals.
Access — Remove the outdoor unit service panel.
Document — Photograph all wires and terminal positions before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires, then unbolt the old contactor from its bracket.
Install — Mount the new contactor, transfer each wire to the matching terminal per your photo, and torque connections snugly.
Test — Restore power, call for cooling, and verify the contactor pulls in cleanly and the compressor and fan energize.

Signs You Need a Replacement

Outdoor unit hums but the compressor and fan do not start.
Visible pitting, burning, or melted plastic on the contact points.
Contactor chatters or rapidly cycles on and off.
Coil does not pull the contacts in when 24V is applied.

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

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

$34.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121SRBA0AAAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121SRBA0AAAA — 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 RGS121SRBA0AAAA — 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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