What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HEAA0AAAA — 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 RGS121HEAA0AAAA — 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 Contactor for RGS121HEAA0AAAA — 30A/40A 24V Coil | Ships Today

Name: ICP 2-Pole Contactor for RGS121HEAA0AAAA — 30A/40A 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

Genuine OEM 2-pole definite-purpose contactor for the ICP / Tempstar / Heil RGS121HEAA0AAAA. This listing covers the factory-specified contactors — part #1178074 (2-pole, 30 amp, 24V coil) and part #1178211 (2-pole, 40 amp, 24V coil). A contactor is the high-current relay that closes when the 24V control signal energizes its coil, sending line voltage to the condenser fan, compressor, or blower load. Over time the silver contacts pit, arc, and weld from constant make-and-break duty. A failing contactor causes hard starts, chattering, buzzing, or equipment that won't energize at all — and burned, welded contacts can leave a unit running when it should be off.

Specifications

Spec	Value
Part Numbers	1178074 (30A), 1178211 (40A)
Type	Definite-Purpose Contactor
Poles	2-Pole
Amp Rating	30A / 40A
Coil Voltage	24V
Brand	ICP (Tempstar / Heil / Comfortmaker)
Fits Model	RGS121HEAA0AAAA

Compatibility

Designed for the ICP RGS121HEAA0AAAA and equivalent Tempstar, Heil, and Comfortmaker units. Match the amp rating (30A vs 40A) and confirm the 24V coil and 2-pole configuration against the contactor currently in your unit before ordering.

Installation Guide

Safety First — Disconnect all power at the breaker and verify zero voltage with a multimeter on the line terminals.
Access — Remove the electrical service panel to expose the contactor.
Document — Photograph every wire and terminal position before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires, then unscrew the old contactor from its mounting bracket.
Install — Mount the new contactor, transfer each wire to the matching terminal per your photos, and confirm tight connections.
Test — Restore power and verify the contactor pulls in cleanly with no chatter and the load energizes.

Signs You Need a Replacement

Loud buzzing, humming, or chattering from the contactor
Pitted, blackened, or welded contacts
Unit fails to start or starts intermittently
Equipment keeps running after the call for heat/cool ends (stuck contacts)

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day hassle-free 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 for RGS121H...

$32.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HEAA0AAAA — 30A/40A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HEAA0AAAA — 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 RGS121HEAA0AAAA — 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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