What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HFBB0AAAA — 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 RGS121HFBB0AAAA — 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 RGS121HFBB0AAAA — 30A & 40A 24V Coil | Ships Today

Name: ICP 2-Pole Contactor for RGS121HFBB0AAAA — 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 definite-purpose contactor is a 2-pole switch with a 24V control coil that energizes the outdoor compressor and condenser fan circuits associated with the ICP Tempstar/Heil RGS121HFBB0AAAA system. Two amperage options are covered: part 1178074 rated 2-pole 30A and part 1178211 rated 2-pole 40A, both with a 24-volt coil. When the thermostat calls for cooling, the low-voltage coil pulls the contacts closed to deliver line voltage to the load. Pitted, welded, or chattering contacts cause hard starts, no-cooling calls, and buzzing — a fresh contactor restores clean, reliable switching.

Specifications

Spec	Value
Part Numbers	1178074 (2P 30A), 1178211 (2P 40A)
Type	Definite Purpose Contactor
Brand	ICP / Tempstar / Heil
Poles	2-Pole
Contact Rating	30A (1178074) / 40A (1178211)
Coil Voltage	24V
Fits Model	RGS121HFBB0AAAA
Fit	OEM Direct Replacement

Compatibility

Fits the ICP/Tempstar/Heil RGS121HFBB0AAAA and related units calling for a 2-pole 24V-coil contactor. Match your existing contactor's amperage (30A or 40A) and confirm a 24V coil before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker and verify zero voltage with a multimeter.
Access — Remove the electrical access panel to reach the contactor.
Document — Photograph all line, load, and 24V coil wiring before disconnecting.
Remove — Label and disconnect the wires, unfasten the old contactor, and lift it out.
Install — Mount the new contactor and reconnect each wire exactly as photographed.
Test — Restore power, call for cooling, and confirm the contacts pull in cleanly with the compressor and fan running normally.

Signs You Need a Replacement

System won't start or only runs intermittently on a cooling call
Loud buzzing, humming, or chattering from the contactor
Pitted, burned, or welded-together contacts
Visible arcing, melted housing, or carbon scoring

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 for RGS121H...

$32.00

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HFBB0AAAA — 30A & 40A 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HFBB0AAAA — 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 RGS121HFBB0AAAA — 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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