What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121SRCB0AAA — 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 RGS121SRCB0AAA — 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 RGS121SRCB0AAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121SRCB0AAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 28.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This is the genuine OEM 2-pole, 30-amp contactor (part number 1178074) with a 24-volt control coil for the ICP / Tempstar / Heil RGS121SRCB0AAA unit. The contactor is the electrically operated switch that closes the high-voltage line to the compressor and condenser fan when the 24V control coil is energized by a call for cooling. Contactor contacts wear with every cycle — pitting, arcing, and welding are common failure modes that leave the system unable to start or unable to shut off. The 2-pole design switches both legs of the 240V supply. Replacing it with the exact OEM 30A / 24V contactor restores reliable, safe switching with the correct contact rating and coil voltage.

Specifications

Spec	Value
Part Number	1178074
Type	2-Pole (Double-Pole) Contactor
Brand	ICP / Tempstar / Heil
Contact Rating	30 Amps
Coil Voltage	24V
Poles	2
Fits Model	RGS121SRCB0AAA

Compatibility

Designed for the ICP-family RGS121SRCB0AAA and widely shared across Tempstar, Heil, Comfortmaker, and ICP condensing units that use a 2-pole 30A contactor with a 24V coil. Verify amperage, pole count, and coil voltage against your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter at the contactor line terminals.
Access — Remove the condenser electrical panel.
Document — Photograph every line, load, and 24V coil wire before disconnecting.
Remove — Transfer wires one at a time, then unscrew the old contactor from its mount.
Install — Mount the new contactor and reconnect each wire to its matching terminal per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the compressor and fan start.

Signs You Need a Replacement

Compressor and condenser fan will not start on a cooling call
System will not shut off (welded contacts)
Loud humming, buzzing, or chattering from the contactor
Burned, pitted, or melted contacts or housing

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...

$28.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121SRCB0AAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121SRCB0AAA — 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 RGS121SRCB0AAA — 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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