What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HRAA0AAAA — 30A/40A 24V Coil | 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 RGS121HRAA0AAAA — 30A/40A 24V Coil | 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 Definite Purpose Contactor for RGS121HRAA0AAAA — 30A/40A 24V Coil | Ships Today

Name: ICP 2-Pole Definite Purpose Contactor for RGS121HRAA0AAAA — 30A/40A 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 32.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM 2-pole definite purpose contactor is the electrically-controlled switch that energizes the compressor and condenser fan circuits in your ICP RGS121HRAA0AAAA system. When the thermostat calls for cooling, the 24V control coil pulls the contacts closed, delivering line voltage to the high-amperage components. ICP offers this assembly in both 30A (P/N 1178074) and 40A (P/N 1178211) ratings. Contactors are a high-wear item — pitted, welded, or chattering contacts are among the most frequent causes of a no-cool or short-cycling complaint.

Specifications

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

Compatibility

Engineered for the ICP/Heil/Tempstar RGS121HRAA0AAAA gas furnace and condensing unit family. Confirm the amperage rating stamped on your existing contactor before ordering. Definite purpose contactors of matching pole count, coil voltage, and equal-or-greater amp rating are interchangeable.

Installation Guide

Safety First — Disconnect power at the breaker and service disconnect, then verify zero voltage with a multimeter.
Access — Remove the unit service panel.
Document — Photograph all line, load, and coil wiring before disconnecting.
Remove — Note terminal positions, disconnect leads, and unscrew the old contactor from its mounting plate.
Install — Mount the new contactor and reconnect each wire exactly per your photo.
Test — Restore power, call for cooling, and confirm the contacts pull in cleanly with no chatter.

Signs You Need a Replacement

System fails to start when the thermostat calls for cooling
Loud buzzing, humming, or chattering at the contactor
Visibly pitted, burned, or welded contacts
Compressor or fan runs continuously and won't shut off

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 Definite Purpose Cont...

$32.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HRAA0AAAA — 30A/40A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HRAA0AAAA — 30A/40A 24V Coil | 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 RGS121HRAA0AAAA — 30A/40A 24V Coil | 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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