What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS120LSAA0AGAA – 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 RGS120LSAA0AGAA – 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 RGS120LSAA0AGAA – OEM 1178074 | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS120LSAA0AGAA – OEM 1178074 | Ships Today
Brand: ICP
SKU: 1178074
Price: 38.94 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This genuine OEM 2-pole, 30-amp contactor (part number 1178074) with a 24-volt coil is the electrical switch that energizes the compressor and condenser fan in the ICP Tempstar Heil RGS120LSAA0AGAA system. When the thermostat calls, 24V is applied to the coil, pulling the contacts closed and sending line voltage to the outdoor unit. Contactors are a high-wear part: the contacts arc on every cycle and eventually pit, weld, or burn. A failing contactor causes a system that won't start, chatters, or that runs continuously because the contacts have welded shut. Installing the correct 30A 24V replacement restores clean, reliable switching.

Specifications

Spec	Value
Part Number	1178074
Type	Definite-purpose contactor, 2-pole
Contact Rating	30 Amps
Coil Voltage	24 VAC
Poles	2
Brand	ICP / Tempstar / Heil
Fit	OEM exact replacement

Compatibility

Fits the ICP Tempstar Heil RGS120LSAA0AGAA and other ICP-family units specifying a 2-pole 30A contactor with a 24V coil. Confirm pole count, amp rating, and coil voltage against the part you are removing.

Installation Guide

Safety First – Disconnect power at the breaker and the unit disconnect. Verify zero voltage with a multimeter.
Access – Remove the control/electrical access panel.
Document – Photograph every wire and terminal before disconnecting anything.
Remove – Transfer wires one at a time, or label them, then unscrew and remove the old contactor.
Install – Mount the new contactor and reconnect each wire to the matching terminal per your photo.
Test – Restore power and confirm the contactor pulls in on a call and that the compressor and fan start normally.

Signs You Need a Replacement

Buzzing, chattering, or humming from the contactor
Outdoor unit won't start on a cooling call
Pitted, blackened, or welded contacts
System keeps running after the thermostat is satisfied (welded contacts)

Shipping & Returns

Ships same day on orders 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...

$38.94

Frequently Asked Questions

Does this Contactor fit my ICP RGS120LSAA0AGAA – OEM 1178074 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS120LSAA0AGAA – 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 RGS120LSAA0AGAA – 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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