What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS150HTAA0AGAA — OEM 1178074 / 1178211 | 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 RGS150HTAA0AGAA — OEM 1178074 / 1178211 | 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 Contactor 30A / 40A 24V for RGS150HTAA0AGAA — OEM 1178074 / 1178211 | Ships Today

Name: ICP 2-Pole Contactor 30A / 40A 24V for RGS150HTAA0AGAA — OEM 1178074 / 1178211 | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 28.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

OEM 2-pole definite purpose contactors for the ICP/Tempstar/Heil RGS150HTAA0AGAA. This covers part 1178074 (2-pole, 30A, 24V coil) and 1178211 (2-pole, 40A, 24V coil). A contactor is the electrically operated switch that closes the line-voltage circuit to the compressor and condenser fan when the 24V control signal energizes the coil. Pitted, welded, or chattering contacts are one of the most common no-cool service calls — burned contacts cause hard starts, low voltage to the compressor, and eventual compressor failure.

Specifications

Spec	Value
Part Numbers	1178074 (30A), 1178211 (40A)
Type	2-Pole Definite Purpose Contactor
Coil Voltage	24V
Contact Rating	30A and 40A options
Poles	2
Brand	ICP / Tempstar / Heil

Compatibility

Fits the ICP/Tempstar/Heil RGS150HTAA0AGAA. Match the amp rating (30A or 40A) and 24V coil to your existing contactor before installing.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter.
Access — Remove the electrical service panel.
Document — Photograph all line, load, and 24V coil wiring before disconnecting.
Remove — Transfer wires one at a time, or label each, then unbolt the old contactor.
Install — Mount the new contactor and reconnect line, load, and coil leads per your photo.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the compressor/fan energize.

Signs You Need a Replacement

Pitted, burned, or welded contacts
Buzzing or chattering at the contactor
Compressor/fan won't start or starts intermittently
Visible arcing or melted housing

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 Contactor 30A / 40A 2...

$28.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS150HTAA0AGAA — OEM 1178074 / 1178211 | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS150HTAA0AGAA — OEM 1178074 / 1178211 | 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 RGS150HTAA0AGAA — OEM 1178074 / 1178211 | 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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