What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HEBA0AAAA — 24V Coil OEM | 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 RGS121HEBA0AAAA — 24V Coil OEM | 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 RGS121HEBA0AAAA — 24V Coil OEM | Ships Today

Name: ICP 2-Pole 30A/40A Contactor for RGS121HEBA0AAAA — 24V Coil OEM | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 34.00 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This OEM 2-pole contactor is the switching relay that powers the compressor and condenser fan circuit on the ICP/Heil/Tempstar RGS121HEBA0AAAA system. A 24V control signal from the thermostat energizes the coil, pulling the contacts closed to deliver line voltage to the outdoor unit. Over time the contacts pit, burn, or weld, and the coil can fail — causing a unit that won't start, chatters, or won't shut off. This listing covers OEM 1178074 (2-pole, 30A, 24V) and 1178211 (2-pole, 40A, 24V) so you can match your system's amperage rating exactly.

Specifications

Spec	Value
OEM Part Number	1178074 (30A), 1178211 (40A)
Type	Definite purpose contactor, 2-pole
Brand	ICP / Heil / Tempstar / Comfortmaker
Rating	30A or 40A
Coil Voltage	24V
Poles	2
Fit	OEM direct replacement
Model	RGS121HEBA0AAAA

Compatibility

Designed for the ICP family RGS121HEBA0AAAA and shared Heil, Tempstar, and Comfortmaker equipment. Match the amperage (30A 1178074 or 40A 1178211) and confirm the 24V coil before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
Access — Remove the electrical/control service panel.
Document — Photograph all line, load, and 24V coil wires before disconnecting.
Remove — Transfer wires one at a time or label them, then unscrew and remove the old contactor.
Install — Mount the new contactor (1178074 or 1178211) and reconnect each wire to the matching terminal per your photo.
Test — Restore power, call for cooling, and confirm the contacts pull in and the compressor/fan energize.

Signs You Need a Replacement

Burned, pitted, or welded contacts.
Buzzing or chattering when energized.
Unit won't start or won't shut off.
Coil fails to pull contacts in with 24V applied.

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 for...

$34.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HEBA0AAAA — 24V Coil OEM | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HEBA0AAAA — 24V Coil OEM | 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 RGS121HEBA0AAAA — 24V Coil OEM | 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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