What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS120STCB0AAA — OEM 1178074 | 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 RGS120STCB0AAA — OEM 1178074 | 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 24V Contactor for RGS120STCB0AAA — OEM 1178074 | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS120STCB0AAA — OEM 1178074 | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM 2-pole 30-amp contactor (part number 1178074) is the switching relay for the ICP / Tempstar / Heil RGS120STCB0AAA. Its 24-volt coil is energized by the thermostat/control board to pull in the main contacts, routing line voltage to the compressor and condenser fan motor. Contactors fail from pitted or welded contacts, a burned-out coil, or chattering caused by insects and debris under the armature. Symptoms include a system that won't start, a humming outdoor unit, or contacts that stick closed and keep the compressor running. A fresh OEM contactor restores reliable, full-voltage switching.

Specifications

Spec	Value
Part Number	1178074
Type	Definite Purpose Contactor, 2-Pole
Brand	ICP / Tempstar / Heil
Contact Rating	30 Amps
Coil Voltage	24 VAC
Poles	2
Fits Model	RGS120STCB0AAA
Fitment	OEM exact replacement

Compatibility

Direct fit for the RGS120STCB0AAA and other ICP-family systems sold under ICP, Tempstar, Heil, and Comfortmaker that specify a 2-pole 30A 24V definite-purpose contactor. Verify amp rating and coil voltage against your old part before installing.

Installation Guide

Safety First — Disconnect power at the breaker and pull the outdoor disconnect. Verify zero voltage with a multimeter.
Access — Remove the unit's electrical service panel.
Document — Photograph every wire on the line, load, and coil terminals before disconnecting.
Remove — Transfer wires one at a time, or label them, then unmount the old contactor.
Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the compressor/fan energize.

Signs You Need a Replacement

Outdoor unit hums but compressor/fan won't start
Pitted, burned, or welded contacts
Chattering or buzzing contactor
Compressor keeps running after the call for cooling ends

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 24V Contactor for...

$32.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS120STCB0AAA — OEM 1178074 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS120STCB0AAA — OEM 1178074 | 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 RGS120STCB0AAA — OEM 1178074 | 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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