What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCA5604GKA100 — 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 WCA5604GKA100 — 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 40A Contactor for WCA5604GKA100 — Definite Purpose | Ships Today

Name: ICP 40A Contactor for WCA5604GKA100 — Definite Purpose | Ships Today
Brand: ICP
SKU: 1176763-GEN
Price: 29.95 USD
Availability: InStock

SKU: 1176763-GEN Brand: ICP

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Overview

This OEM 40-amp definite purpose contactor (part 1176763) is the main switching relay for the ICP / Tempstar / Heil WCA5604GKA100 condensing unit. The contactor takes the 24V command from the thermostat or control board and closes its 40A power contacts to energize the compressor and condenser fan motor. Because the contacts open and close on every system cycle, they are one of the most common wear-out parts in an outdoor unit — arcing gradually pits and burns the contact surfaces. Failure symptoms include an outdoor unit that won't start, a loud humming or chattering contactor, or contacts that weld shut so the unit runs nonstop.

Specifications

Spec	Value
Part Number	1176763
Type	Definite Purpose Contactor
Brand	ICP / Tempstar / Heil
Contact Rating	40A
Coil Voltage	24V
Fits Model	WCA5604GKA100
Fit	OEM Replacement

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil WCA5604GKA100 condensing unit. The 40A rating and 24V coil match the factory switching device for this unit's compressor and condenser fan circuits. Verify your existing contactor's pole count and coil voltage before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and verify zero voltage with a multimeter across the line terminals.
Access — Remove the condenser control panel to expose the contactor.
Document — Photograph all line, load, and 24V coil wiring before disconnecting.
Remove — Transfer wires one at a time, then unscrew the contactor from its mounting bracket.
Install — Mount the new 40A contactor, reconnect each wire to the matching terminal per your photo, and torque the terminals snug.
Test — Restore power and confirm the contactor pulls in on a call and the compressor and fan energize cleanly.

Signs You Need a Replacement

Outdoor unit won't start on a cooling call
Loud humming, buzzing, or chattering from the contactor
Pitted, burned, or welded contacts on inspection
Compressor and fan run continuously and won't shut off

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 40A Contactor for WCA5604GKA...

$29.95

Frequently Asked Questions

Does this Contactor fit my ICP WCA5604GKA100 — Definite Purpose | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCA5604GKA100 — 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 WCA5604GKA100 — 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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