What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | 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 RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | 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 RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | Ships Today

Name: ICP 2-Pole Contactor for RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | Ships Today
Brand: ICP
SKU: 1178074-GEN
Price: 28.95 USD
Availability: InStock

SKU: 1178074-GEN Brand: ICP

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Overview

This OEM 2-pole definite purpose contactor fits the ICP / Heil / Tempstar RGS121HTAB0AAAA system and is offered in both 30 amp (part 1178074) and 40 amp (part 1178211) ratings, each with a 24-volt coil. The contactor is the electrically operated switch that energizes the compressor and condenser fan motor whenever the thermostat calls for cooling. The 24V coil pulls the contacts closed to deliver line voltage to the high-load components. Over time the silver contacts pit, burn, and weld from arcing, and the coil can fail open — the classic symptoms are a system that hums but won't start, a condenser that won't shut off, chattering contacts, or no compressor operation at all. Choose the amp rating that matches your existing contactor.

Specifications

Spec	Value
Part Number (30A)	1178074
Part Number (40A)	1178211
Type	2-Pole Definite Purpose Contactor
Poles	2
Amperage	30A / 40A
Coil Voltage	24V
Brand	ICP / Heil / Tempstar
Fitment	OEM Direct Replacement

Compatibility

Direct OEM replacement for the ICP / Heil / Tempstar / Comfortmaker RGS121HTAB0AAAA and related units using a 2-pole 24V-coil contactor. Match the amp rating (30A or 40A) and coil voltage to the contactor currently installed. Verify your model and serial tag before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the service panel to expose the contactor.
Document — Photograph every line, load, and 24V coil wire before disconnecting.
Remove — Transfer wires one at a time, or label them, then unscrew the old contactor from its bracket.
Install — Mount the new contactor, reconnect each wire to the matching terminal per your photo, and confirm the coil leads are landed.
Test — Restore power, call for cooling, and verify the contacts pull in cleanly and the compressor and fan start.

Signs You Need a Replacement

System hums or buzzes but the compressor won't start.
Burned, pitted, or welded contacts.
Condenser unit won't shut off when cooling is satisfied.
Chattering or buzzing contactor with a weak or open coil.

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...

$28.95

Frequently Asked Questions

Does this Contactor fit my ICP RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | 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 RGS121HTAB0AAAA — 30A & 40A 24V OEM Options | 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.

Menu