What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCH4304GKB100 — 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 WCH4304GKB100 — 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 Single-Pole 30A Contactor for WCH4304GKB100 — 24V Coil w/Shunt | Ships Today

Name: ICP Single-Pole 30A Contactor for WCH4304GKB100 — 24V Coil w/Shunt | Ships Today
Brand: ICP
SKU: 1172472
Price: 29.84 USD
Availability: InStock

SKU: 1172472 Brand: ICP

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Overview

This OEM single-pole definite-purpose contactor (part #1172472) is the main switching relay for the outdoor unit on your ICP Tempstar/Heil WCH4304GKB100 heat pump. Rated at 30 amps with a 24-volt control coil and a built-in shunt, it energizes the compressor and condenser fan when the thermostat calls. Its silver-alloy contacts close to complete the high-voltage circuit and open to break it; constant arcing eventually pits, burns, or welds them. Common failure symptoms are a unit that won't start, a buzzing or chattering condenser, contacts welded closed so the compressor never shuts off, or a humming outdoor unit with no fan movement.

Specifications

Spec	Value
Part Number	1172472
Type	Single-Pole (1P) Contactor
Brand	ICP / Tempstar / Heil
Contact Rating	30 Amps
Coil Voltage	24V
Features	Integrated Shunt

Compatibility

Direct OEM fit for the ICP Tempstar/Heil WCH4304GKB100 heat pump condensing unit. The 1172472 contactor is shared across many WCH-series heat pumps and comparable Comfortmaker/Day & Night condensers that use a single-pole 30A 24V contactor — confirm against your unit's parts list.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage at the contactor terminals with a multimeter.
Access — Remove the condenser service/access panel.
Document — Photograph all line, load, and 24V coil wires before disconnecting.
Remove — Unscrew the contactor from its bracket and move wires one at a time to the matching terminals on the new part.
Install — Mount the new contactor and reconnect each wire exactly as photographed.
Test — Restore power, call for cooling, and confirm the contactor pulls in and the compressor and fan start.

Signs You Need a Replacement

Outdoor unit hums or buzzes but won't start
Pitted, burned, or welded contacts
Compressor runs continuously from stuck contacts
Chattering relay or intermittent cooling

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 Single-Pole 30A Contactor fo...

$29.84

Frequently Asked Questions

Does this Contactor fit my ICP WCH4304GKB100 — 24V Coil w/Shunt | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCH4304GKB100 — 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 WCH4304GKB100 — 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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