What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS120HDBA0AGAA — 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 RGS120HDBA0AGAA — 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 RGS120HDBA0AGAA — OEM 1178074 | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS120HDBA0AGAA — OEM 1178074 | Ships Today
Brand: ICP
SKU: 1178074
Price: 41.60 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This is the genuine OEM 2-pole, 30-amp contactor with a 24-volt coil (part number 1178074) for the ICP / Tempstar / Heil RGS120HDBA0AGAA unit. The contactor is the high-voltage switch that powers the compressor and condenser fan motor. When the thermostat calls for cooling, the 24V coil pulls the contacts closed and sends line voltage to the outdoor unit. Over time the contacts pit, burn, and weld, or the coil fails — leaving the system unable to start, chattering, or stuck running. Replacing a worn contactor restores reliable, clean switching.

Specifications

Spec	Value
Part Number	1178074
Type	Contactor, Definite Purpose
Brand	ICP / Tempstar / Heil
Poles	2-Pole
Contact Rating	30 Amp
Coil Voltage	24V
Fits Model	RGS120HDBA0AGAA
Fit	OEM Replacement

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil RGS120HDBA0AGAA and related RGS-series units using a 2-pole, 30A, 24V-coil contactor (part 1178074). Confirm pole count, amp rating, and 24V coil 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 electrical service panel on the outdoor unit to expose the contactor.
Document — Photograph all line, load, and 24V coil wire positions before disconnecting.
Remove — Disconnect each wire, then unscrew and remove the old contactor from its mounting.
Install — Mount the new 2-pole 30A contactor and reconnect every wire to the matching terminal per your photos.
Test — Restore power, call for cooling, and confirm the coil pulls in and the compressor and fan energize.

Signs You Need a Replacement

Outdoor unit won't start on a cooling call
Loud humming, buzzing, or chattering from the contactor
Pitted, burnt, or welded contacts that stay closed
System runs continuously and won't shut off

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 24V Contactor for...

$41.60

Frequently Asked Questions

Does this Contactor fit my ICP RGS120HDBA0AGAA — OEM 1178074 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS120HDBA0AGAA — 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 RGS120HDBA0AGAA — 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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