What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCA3424GKB1 — 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 WCA3424GKB1 — 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 WCA3424GKB1 — 24V Coil with Shunt | Ships Today

Name: ICP 1-Pole 30A Contactor for WCA3424GKB1 — 24V Coil with Shunt | Ships Today
Brand: ICP
SKU: 1172472
Price: 41.60 USD
Availability: InStock

SKU: 1172472 Brand: ICP

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Overview

Genuine OEM part number 1172472 is the definite-purpose contactor that controls power to the ICP Tempstar Heil WCA3424GKB1 condensing unit. It is a 1-pole, 30-amp contactor with a 24-volt control coil and a built-in shunt. When the 24V thermostat circuit energizes the coil, the contacts close and route line voltage to the compressor and condenser fan motor; when the cooling call ends, the coil releases and the contacts open. Because it switches every cooling cycle, the contactor's contacts gradually pit, burn, or weld and its coil can weaken — a leading cause of no-cooling service calls. Common symptoms include a buzzing unit that will not start, a compressor that runs continuously, and arcing or carbon buildup on the terminals.

Specifications

Spec	Value
Part Number	1172472
Type	Definite-purpose contactor, 1-pole
Brand	ICP (Tempstar / Heil)
Contact Rating	30 Amps
Coil Voltage	24V
Poles	1
Feature	Includes shunt

Compatibility

Designed as a direct OEM replacement for the ICP Tempstar Heil WCA3424GKB1 air conditioner condensing unit. The 1172472 contactor also services many other ICP-family outdoor units (Tempstar, Heil, Comfortmaker) specified for a 1-pole 30A 24V contactor with shunt. Always match amperage, pole count, and coil voltage to your unit's wiring diagram before installing.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter at the contactor terminals.
Access — Remove the condenser service panel to expose the electrical compartment.
Document — Photograph all wire connections before disconnecting anything.
Remove — Note the line, load, and 24V coil wire positions, disconnect them, and unscrew the old contactor from the bracket.
Install — Mount the new contactor, transfer each wire to the matching terminal per your photo, and confirm the shunt connection.
Test — Restore power, call for cooling, and verify the contacts pull in cleanly and the compressor and fan run.

Signs You Need a Replacement

Outdoor unit buzzes but will not start.
Compressor runs nonstop from welded contacts.
Pitted, burned, or corroded contact points.
Chattering coil or intermittent cooling.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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...

$41.60

Frequently Asked Questions

Does this Contactor fit my ICP WCA3424GKB1 — 24V Coil with Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCA3424GKB1 — 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 WCA3424GKB1 — 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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