What amp contactor do I need for my ICP system?

The correct replacement for ICP model RGS121LSAA0AAAA — 30 Amp 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 RGS121LSAA0AAAA — 30 Amp 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 RGS121LSAA0AAAA — 30 Amp Definite Purpose | Ships Today

Name: ICP 2-Pole 30A 24V Contactor for RGS121LSAA0AAAA — 30 Amp Definite Purpose | Ships Today
Brand: ICP
SKU: 1178074
Price: 33.80 USD
Availability: InStock

SKU: 1178074 Brand: ICP

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Overview

This genuine OEM 2-pole, 30-amp definite-purpose contactor (part 1178074) is the switching relay for the ICP Tempstar Heil RGS121LSAA0AAAA system. Its 24-volt coil is energized by the thermostat/control board, pulling in the contacts to send line voltage to the compressor and condenser fan motor. The contactor is one of the hardest-working components in the system, cycling on and off thousands of times per season. Over time the contacts pit, burn, and stick, while the coil can fail open. A bad contactor is one of the most common causes of a unit that won't start, chatters, or won't shut off — and it is an inexpensive, high-impact replacement.

Specifications

Spec	Value
Part Number	1178074 — Contactor, 2P 30A 24V
Type	Definite-purpose contactor, 2-pole
Brand	ICP (Tempstar / Heil)
Contact Rating	30 Amps
Coil Voltage	24 VAC
Poles	2
Fit	OEM direct replacement

Compatibility

Built for the ICP RGS121LSAA0AAAA and shared-platform units sold under ICP, Heil, Tempstar, and Comfortmaker that use a 2-pole 30A contactor with a 24V coil. Verify pole count, amp rating, and coil voltage against your existing contactor before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker; verify zero voltage at the contactor line terminals with a multimeter.
Access — Remove the unit's electrical service panel.
Document — Photograph every wire and terminal before disconnecting.
Remove — Label and disconnect the line, load, and 24V coil wires, then unfasten the old contactor.
Install — Mount the new contactor and reconnect all wiring exactly per your photo, confirming line/load and coil terminals.
Test — Restore power and confirm the contactor pulls in on a call for cooling and drops out cleanly when satisfied.

Signs You Need a Replacement

Pitted, burned, or welded (stuck) contacts
Unit hums or chatters but won't start
Compressor/fan won't shut off after the call ends
Buzzing coil or no pull-in with 24V present

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 30A 24V Contactor for...

$33.80

Frequently Asked Questions

Does this Contactor fit my ICP RGS121LSAA0AAAA — 30 Amp Definite Purpose | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP RGS121LSAA0AAAA — 30 Amp 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 RGS121LSAA0AAAA — 30 Amp 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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