What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCH4374GKB100 — 24V Coil w/ 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 WCH4374GKB100 — 24V Coil w/ 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 WCH4374GKB100 — 24V Coil w/ Shunt | Ships Today

Name: ICP 1-Pole 30A Contactor for WCH4374GKB100 — 24V Coil w/ Shunt | Ships Today
Brand: ICP
SKU: 1172472
Price: 44.20 USD
Availability: InStock

SKU: 1172472 Brand: ICP

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Overview

This genuine OEM single-pole 30-amp contactor (OEM #1172472, CONTACTOR 1P 30A 24V W/SHUNT) is the high-voltage switch for the ICP/Tempstar/Heil WCH4374GKB100 condensing unit. When the thermostat calls for cooling, the 24V coil pulls the contacts closed, sending line voltage to the compressor and condenser fan motor. The integrated shunt provides the bleed/holding path for reliable operation. Contactors are among the most common failure points in outdoor units: pitted or welded contacts, an open 24V coil, or insect/debris fouling all cause the unit to fail to start, chatter, or run continuously. A fresh OEM 1-pole 30A contactor restores clean, dependable switching.

Specifications

Spec	Value
Part Number	1172472
Type	Definite Purpose Contactor (1-Pole)
Brand	ICP (Tempstar / Heil / Comfortmaker)
Contact Rating	30 Amps
Poles	1
Coil Voltage	24V (with shunt)
Application	AC Compressor / Condenser

Compatibility

Direct-fit replacement for the ICP/Tempstar/Heil WCH4374GKB100 and other ICP-family condensing units using a 1-pole, 30A, 24V-coil definite-purpose contactor. Confirm pole count (1), amp rating (30A), and coil voltage (24V) match your existing part before installing.

Installation Guide

Safety First — Disconnect power at the breaker and disconnect; verify zero voltage with a multimeter.
Access — Remove the condenser electrical access panel.
Document — Photograph every wire and terminal before disconnecting.
Remove — Transfer wires one at a time, then unscrew and lift out the old contactor.
Install — Mount the new contactor, reconnect line, load, and 24V coil leads per your photo.
Test — Restore power and call for cooling; confirm the contactor pulls in and the unit starts.

Signs You Need a Replacement

Outdoor unit won't start, or only starts when the contactor is pressed by hand.
Loud buzzing, chattering, or humming at the contactor.
Pitted, burned, or welded-together contacts.
Unit runs nonstop and won't shut off (stuck closed).

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 WCH...

$44.20

Frequently Asked Questions

Does this Contactor fit my ICP WCH4374GKB100 — 24V Coil w/ Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCH4374GKB100 — 24V Coil w/ 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 WCH4374GKB100 — 24V Coil w/ 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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