What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HDAA0AAAA — 24V Coil Set | 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 RGS121HDAA0AAAA — 24V Coil Set | 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 & 40A Contactor for RGS121HDAA0AAAA — 24V Coil Set | Ships Today

Name: ICP 2-Pole 30A & 40A Contactor for RGS121HDAA0AAAA — 24V Coil Set | Ships Today
Brand: ICP
SKU: 1178074
Price: 44.20 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This genuine OEM contactor set for the ICP / Tempstar / Heil RGS121HDAA0AAAA covers both the 2-pole 30-amp (part 1178074) and 2-pole 40-amp (part 1178211) contactors, each with a 24-volt control coil. A contactor is the electrically operated switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. The 24V coil pulls the contacts closed to pass line voltage to the load; when the call ends, the contacts open. Contactors are a common wear item — the silver contacts pit, burn, and weld over thousands of cycles, causing chattering, hard starts, or a system that won't shut off. Replacing with the correct amperage rating restores reliable, safe switching.

Specifications

Spec	Value
Part Number (30A)	1178074
Part Number (40A)	1178211
Type	Definite Purpose Contactor
Poles	2-Pole
Contact Rating	30A / 40A
Coil Voltage	24V
Brand	ICP (Tempstar / Heil / Comfortmaker)
Fit	OEM Direct Replacement

Compatibility

Fits the ICP / Tempstar / Heil RGS121HDAA0AAAA and other RGS-series condensing units. Match the amperage rating (30A or 40A) and the 24V coil to your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the condensing unit electrical access panel.
Document — Photograph every line, load, and 24V coil wire before disconnecting.
Remove — Transfer wires one at a time, or label them, then unbolt the old contactor from the bracket.
Install — Mount the new contactor, reconnect each wire exactly per your photo to the matching terminal.
Test — Restore power, call for cooling, and confirm the contactor pulls in cleanly and the compressor and fan energize.

Signs You Need a Replacement

Chattering or buzzing contactor that won't pull in solidly
Pitted, burned, or welded contacts
Compressor that won't start or won't shut off
Visible arcing, melted housing, or a humming coil

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 & 40A Contactor f...

$44.20

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HDAA0AAAA — 24V Coil Set | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HDAA0AAAA — 24V Coil Set | 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 RGS121HDAA0AAAA — 24V Coil Set | 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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