What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121SRAB0AAAA — 2-Pole 30A 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 RGS121SRAB0AAAA — 2-Pole 30A 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 Contactor for RGS121SRAB0AAAA — 2-Pole 30A 24V Coil | Ships Today

Name: ICP Contactor for RGS121SRAB0AAAA — 2-Pole 30A 24V Coil | Ships Today
Brand: ICP
SKU: 1178074
Price: 45.44 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This is the genuine OEM 2-pole contactor (part number 1178074) for the ICP / Tempstar / Heil RGS121SRAB0AAAA gas furnace and matched condensing unit. The contactor is a 30-amp, 24-volt coil electromechanical switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. When the 24V control signal hits the coil, the contacts pull in and pass line voltage to the outdoor unit. A failed contactor is one of the most common no-cooling service calls — symptoms include a humming outdoor unit that won't start, chattering contacts, pitted or welded points that leave the system running constantly, or burnt terminals. Replacing this 30A 24V part restores reliable switching and protects the more expensive compressor downstream.

Specifications

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

Compatibility

Designed as the factory replacement for the ICP RGS121SRAB0AAAA and shared across many Tempstar, Heil, and Comfortmaker condensing units that use a 2-pole 30A 24V definite-purpose contactor. Always confirm your existing contactor is rated 30A with a 24V coil before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage at the contactor line terminals with a multimeter.
Access — Remove the condenser service panel to expose the control area.
Document — Photograph all line, load, and 24V coil wires before disconnecting.
Remove — Note wire positions, release the old contactor from its mounting screws, and transfer one wire at a time.
Install — Mount the new contactor, reconnect each wire to the matching terminal per your photo, and confirm the 24V coil leads are landed.
Test — Restore power, call for cooling, and verify the contacts pull in and the compressor/fan start.

Signs You Need a Replacement

Outdoor unit hums but the compressor and fan won't start.
Loud chattering or buzzing from the contactor.
Pitted, burnt, or welded contacts that keep the unit running after cooling stops.
Visible arcing, melted terminals, or a stuck plunger.

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 Contactor for RGS121SRAB0AAA...

$45.44

Frequently Asked Questions

Does this Contactor fit my ICP RGS121SRAB0AAAA — 2-Pole 30A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121SRAB0AAAA — 2-Pole 30A 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 RGS121SRAB0AAAA — 2-Pole 30A 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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