What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS180LTCA0AAAA — 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 RGS180LTCA0AAAA — 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 RGS180LTCA0AAAA — OEM 1178074 | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS180LTCA0AAAA — OEM 1178074 | Ships Today
Brand: ICP
SKU: 1178074
Price: 42.84 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This OEM 2-pole, 30-amp contactor with a 24-volt coil (part number 1178074) is the factory-specified switching relay for the ICP / Tempstar / Heil RGS180LTCA0AAAA system. A contactor is the electrically operated switch that closes to send line voltage to the compressor and condenser fan when the thermostat calls, and opens to shut them off. Its contacts carry high current thousands of times per season, so they eventually pit, arc, and burn — a failing contactor is one of the most common reasons a system won't start or won't shut off.

Specifications

Spec	Value
Part Number	1178074
Type	Definite Purpose Contactor
Brand	ICP (Tempstar / Heil)
Poles	2-Pole
Contact Rating	30 Amp
Coil Voltage	24V
Fit	OEM direct replacement

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil RGS180LTCA0AAAA. The 2-pole / 30A / 24V configuration is widely used across matched ICP-family condensing units — confirm pole count, amp rating, and a 24V coil against your existing contactor before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the control-box service panel.
Document — Photograph all line, load, and coil wiring before disconnecting.
Remove — Transfer wires one at a time, or unscrew the old contactor from its mounting feet and lift it out.
Install — Mount the new contactor, reconnect each lead to the matching terminal per your photo, and confirm the 24V coil leads are landed correctly.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly with no chatter and drops out on satisfaction.

Signs You Need a Replacement

Burned, pitted, or welded contacts
Chattering or buzzing contactor that won't pull in firmly
Compressor and fan won't start even though the thermostat is calling
System won't shut off because contacts are stuck closed

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...

$42.84

Frequently Asked Questions

Does this Contactor fit my ICP RGS180LTCA0AAAA — OEM 1178074 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS180LTCA0AAAA — 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 RGS180LTCA0AAAA — 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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