What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121LSAB0AAAA — Definite Purpose | 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 RGS121LSAB0AAAA — Definite Purpose | 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 24V Contactor for RGS121LSAB0AAAA — Definite Purpose | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS121LSAB0AAAA — Definite Purpose | Ships Today
Brand: ICP
SKU: 1178074
Price: 37.64 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This OEM 2-pole, 30-amp definite purpose contactor (1178074) with a 24V coil is the main switching relay for the ICP / Tempstar / Heil RGS121LSAB0AAAA system. When the control board or thermostat sends 24 volts to the coil, the contactor's magnetic armature pulls in and closes both line-voltage poles, energizing the load. Contactors are high-wear components: their silver contacts pit and burn from the inrush current of every cycle, and the coil can fail open, leaving the equipment dead even though low-voltage controls are working. Replacing a worn contactor restores clean, reliable switching and prevents chattering, welding, and nuisance no-start calls.

Specifications

Spec	Value
OEM Part Number	1178074
Type	Definite Purpose Contactor
Poles	2-Pole
Contact Rating	30A
Coil Voltage	24V
Brand	ICP / Tempstar / Heil
Fit	OEM Direct Replacement

Compatibility

Designed for the ICP RGS121LSAB0AAAA platform and shared Tempstar, Heil, and Comfortmaker units calling for a 2-pole 30A contactor with a 24V coil. Match poles, amp rating, and coil voltage to your existing part before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter on both line poles.
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 the old contactor from its mount.
Install — Mount the new 2-pole contactor, land the line and load conductors on the correct poles, and connect the 24V coil leads per your photo.
Test — Restore power, call for operation, and confirm the contactor pulls in cleanly with both poles closing and no chatter.

Signs You Need a Replacement

Pitted, burned, or welded contacts
Loud buzzing or chattering when the coil energizes
Equipment won't start even with 24V present at the coil
Visible arcing or melted contactor housing

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 24V Contactor for...

$37.64

Frequently Asked Questions

Does this Contactor fit my ICP RGS121LSAB0AAAA — Definite Purpose | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121LSAB0AAAA — Definite Purpose | 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 RGS121LSAB0AAAA — Definite Purpose | 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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