What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS120HDAA0AGAA — 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 RGS120HDAA0AGAA — 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 RGS120HDAA0AGAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS120HDAA0AGAA — 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 definite purpose contactor (part number 1178074) with a 24-volt control coil for the ICP / Heil / Tempstar RGS120HDAA0AGAA. The contactor is the high-voltage switch that energizes the system's compressor and/or condenser fan motor whenever the 24V thermostat call closes the coil. When the coil is energized, the electromagnet pulls the contacts closed and line voltage passes through; when the call ends, the spring opens the contacts. Because these contacts make and break under load thousands of times per season, they are one of the most common HVAC failure points — pitted, welded, or burned contacts cause hard starts, chattering, buzzing, or a system that won't shut off. The 24V coil matches standard low-voltage control circuits, and the 30A rating suits the RGS120's load.

Specifications

Spec	Value
Part Number	1178074
Type	Definite Purpose Contactor, 2-Pole
Brand	ICP / Heil / Tempstar (OEM)
Contact Rating	30 Amps
Coil Voltage	24 VAC
Poles	2
Fitment	RGS120HDAA0AGAA

Compatibility

A direct-fit replacement for the RGS120HDAA0AGAA and broadly interchangeable across ICP-built Heil, Tempstar, and Comfortmaker equipment using a 2-pole 30A/24V definite purpose contactor. Verify pole count, amp rating, and coil voltage against your old part before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker. Verify zero voltage across the line terminals with a multimeter.
Access — Remove the control/electrical service 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 mounting rail.
Install — Mount the new contactor, reconnect line/load and the two 24V coil leads exactly per your photo.
Test — Restore power, initiate a cooling/heating call, and confirm the contacts pull in cleanly with no chatter.

Signs You Need a Replacement

Loud buzzing, humming, or chattering at the contactor
Pitted, burned, or welded-shut contacts
Compressor/fan won't start or won't shut off
Visible arcing or melted 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 RGS120HDAA0AGAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS120HDAA0AGAA — 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 RGS120HDAA0AGAA — 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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