What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCA3184GKC100 — 24V Coil with Shunt | 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 WCA3184GKC100 — 24V Coil with Shunt | 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 1-Pole 30A Contactor for WCA3184GKC100 — 24V Coil with Shunt | Ships Today

Name: ICP 1-Pole 30A Contactor for WCA3184GKC100 — 24V Coil with Shunt | Ships Today
Brand: ICP
SKU: 1172472
Price: 45.44 USD
Availability: InStock

SKU: 1172472 Brand: ICP

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Overview

This is a genuine OEM single-pole definite purpose contactor (part number 1172472) for the ICP/Tempstar/Heil WCA3184GKC100 condensing unit. The contactor is the electromechanical relay that switches line voltage to the compressor and condenser fan motor whenever the thermostat calls for cooling. Rated for 30 amps with a 24-volt control coil and built with an integrated shunt, it carries the high-current load that the low-voltage thermostat circuit cannot. Common failure symptoms include a system that won't start, chattering or buzzing at the contactor, pitted or welded contacts that keep the compressor running continuously, or visible arcing and burn marks. A worn contactor is one of the most frequent causes of a no-cool service call, and replacing it is an inexpensive way to restore reliable operation.

Specifications

Spec	Value
Part Number	1172472
Type	Definite Purpose Contactor, 1-Pole
Brand	ICP / Tempstar / Heil
Contact Rating	30 Amps
Coil Voltage	24 VAC
Poles	1 (with shunt)
Fitment	OEM Replacement

Compatibility

Engineered as the exact OEM replacement for the ICP/Tempstar/Heil WCA3184GKC100 condensing unit. The 1172472 contactor is also shared across many comparable single-stage ICP-family air conditioners and heat pumps that use a 1-pole, 30A, 24V coil contactor. Always confirm your existing contactor's amp rating, pole count, and coil voltage against the specs above before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and the breaker, then verify zero voltage with a multimeter before touching any wiring.
Access — Remove the service panel on the condensing unit's control compartment.
Document — Photograph all wire connections to the line, load, and coil terminals before disconnecting anything.
Remove — Label and disconnect the wires, then unscrew the old contactor from its mounting bracket.
Install — Mount the new contactor, transfer each wire to the matching terminal per your photo, and confirm the 24V coil leads are landed correctly.
Test — Restore power, call for cooling, and verify the contactor pulls in cleanly and the compressor and fan energize.

Signs You Need a Replacement

Loud buzzing, humming, or chattering coming from the contactor.
Compressor and fan won't start even though the thermostat is calling for cooling.
Pitted, burned, or welded contacts, or a system that keeps running after the call ends.
Visible arcing, melted housing, or a coil that no longer pulls the contacts in.

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 1-Pole 30A Contactor for WCA...

$45.44

Frequently Asked Questions

Does this Contactor fit my ICP WCA3184GKC100 — 24V Coil with Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCA3184GKC100 — 24V Coil with Shunt | 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 WCA3184GKC100 — 24V Coil with Shunt | 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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