What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121LDBB0AAAA — 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 RGS121LDBB0AAAA — 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 30A Contactor for RGS121LDBB0AAAA — 24V Coil | Ships Today

Name: ICP 2-Pole 30A Contactor for RGS121LDBB0AAAA — 24V Coil | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

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Overview

This is the genuine OEM 2-pole, 30-amp contactor with a 24V coil (OEM #1178074) for the ICP/Heil/Tempstar RGS121LDBB0AAAA. The contactor is the high-current relay that switches line power to the compressor and condenser fan whenever the thermostat calls for cooling. Its 24V coil pulls the contacts closed; over time arcing pits and welds those contacts, while the coil can burn open. A failed contactor leaves the outdoor unit dead, buzzing, or stuck running. This OEM-rated replacement restores clean, reliable switching.

Specifications

Spec	Value
Part Number	1178074
Type	Definite Purpose Contactor
Brand	ICP / Heil / Tempstar
Poles	2-Pole
Contact Rating	30 Amp
Coil Voltage	24V
Application	AC Compressor / Condenser Fan
Fitment	OEM Direct Replacement

Compatibility

Direct OEM replacement for the ICP/Heil/Tempstar RGS121LDBB0AAAA and other units that specify the 2-pole 30A 24V contactor 1178074.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker; 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.
Install — Mount the new contactor and reconnect each wire to the matching terminal per your photo.
Test — Restore power and confirm the contactor pulls in and the compressor and fan start on a cooling call.

Signs You Need a Replacement

Outdoor unit hums or buzzes but compressor and fan do not start
Pitted, burned, or welded contacts
Compressor stays running after the thermostat is satisfied
No 24V pull-in or a visibly burned coil

Shipping & Returns

Ships same day on orders placed 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 Contactor for RGS...

$29.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121LDBB0AAAA — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121LDBB0AAAA — 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 RGS121LDBB0AAAA — 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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