What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121LRCA0AAA — 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 RGS121LRCA0AAA — 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 RGS121LRCA0AAA — OEM 1178074 | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS121LRCA0AAA — OEM 1178074 | Ships Today
Brand: ICP
SKU: 1178074
Price: 37.64 USD
Availability: InStock

SKU: 1178074 Brand: ICP

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This genuine OEM definite-purpose contactor (part number 1178074) is a 2-pole, 30-amp unit with a 24-volt control coil for the ICP / Tempstar / Heil RGS121LRCA0AAA system. The contactor is an electrically operated switch: when the 24V thermostat circuit energizes the coil, the contacts close and pass line voltage to the compressor and/or condenser fan motor. Contactors fail from arcing, pitted or welded contacts, and burned-out coils — common after years of high-cycle operation. A worn contactor causes hard starts, chattering, or a system that won't run at all.

Specifications

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

Compatibility

Built for the ICP RGS121LRCA0AAA and other RGS121-platform units sold under the ICP, Tempstar, and Heil brands. Verify the existing contactor is rated 2-pole, 30A, with a 24V coil before installing.

Installation Guide

Safety First — Disconnect power at the breaker and pull the outdoor disconnect. Verify zero voltage with a multimeter across the contactor terminals.
Access — Remove the unit's electrical service panel.
Document — Photograph every wire and terminal position before disconnecting.
Remove — Move wires one at a time from the old contactor to the new one, or label them; unscrew and remove the old contactor.
Install — Mount the new contactor and reconnect each wire to its matching terminal per your photo.
Test — Restore power, call for cooling/heating, and confirm the contacts pull in cleanly with no chatter.

Signs You Need a Replacement

Buzzing, humming, or chattering at the contactor
Pitted, blackened, or welded-shut contacts
System won't start or runs intermittently
Coil fails to pull the contacts in on a thermostat call

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...

$37.64

Frequently Asked Questions

Does this Contactor fit my ICP RGS121LRCA0AAA — OEM 1178074 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121LRCA0AAA — 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 RGS121LRCA0AAA — 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.

Menu