What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121LRBA0AAAA — 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 RGS121LRBA0AAAA — 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 RGS121LRBA0AAAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121LRBA0AAAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 32.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM ICP definite purpose contactor (part number 1178074) is a 2-pole, 30-amp switch with a 24V control coil. The contactor is the heavy-duty relay that energizes your compressor and condenser fan motor whenever the thermostat calls for cooling. When the 24V coil is energized, the electromagnet pulls the contacts closed and passes line voltage to the outdoor unit. Over time the contacts pit, burn, and weld from repeated arcing — a failed contactor is one of the most common causes of an outdoor unit that hums, chatters, or won't start. Replacing it with the correct 2-pole 30A OEM contactor restores reliable switching.

Specifications

Spec	Value
Part Number	1178074
Type	Definite Purpose Contactor, 2-Pole
Brand	ICP
Contact Rating	30A
Coil Voltage	24V
Poles	2

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil RGS121LRBA0AAAA gas furnace and matched condensing units. Also serves as a correct replacement across many ICP-family systems using a 2-pole 30A, 24V-coil contactor. Confirm pole count, amp rating, and coil voltage against your old part before installing.

Installation Guide

Safety First — Disconnect power at the unit disconnect and breaker, and verify zero voltage with a multimeter.
Access — Remove the outdoor unit's electrical service panel.
Document — Photograph all wire connections before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires, then unscrew the old contactor from its bracket.
Install — Mount the new contactor and reconnect each wire exactly per your photo.
Test — Restore power and confirm the contactor pulls in and the unit starts on a cooling call.

Signs You Need a Replacement

Outdoor unit hums or buzzes but the compressor/fan won't start
Visible pitting, burning, or melted plastic on the contactor
Contacts stuck closed — unit runs even with no cooling call
Chattering or rapid clicking when the thermostat calls for cooling

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...

$32.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121LRBA0AAAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121LRBA0AAAA — 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 RGS121LRBA0AAAA — 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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