What amp contactor do I need for my ICP system?

The correct replacement for ICP model WCA3604GKC100 — 24V Coil | 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 WCA3604GKC100 — 24V Coil | 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 2-Pole Contactor for WCA3604GKC100 — 24V Coil | Ships Today

Name: ICP 40A 2-Pole Contactor for WCA3604GKC100 — 24V Coil | Ships Today
Brand: ICP
SKU: 1176763-GEN
Price: 32.95 USD
Availability: InStock

SKU: 1176763-GEN Brand: ICP

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Overview

This OEM 40-amp definite purpose contactor (OEM part #1176763) is the electrical switch that powers the outdoor condensing unit on the ICP/Tempstar/Heil WCA3604GKC100. When the thermostat calls for cooling, the 24-volt control coil energizes and pulls the contacts closed, sending line voltage to the compressor and condenser fan motor. A 2-pole, 40A contactor handles the high inrush current of a single-phase compressor every cooling cycle. Over thousands of cycles the silver contact points pit, burn, and weld — leading to a system that won't start, won't shut off, hums, or chatters. Replacing a worn contactor is one of the most common and inexpensive HVAC repairs.

Specifications

Spec	Value
OEM Part Number	1176763
Type	Definite Purpose Contactor
Brand	ICP / Tempstar / Heil
Contact Rating	40 Amps
Poles	2-Pole
Coil Voltage	24 VAC
Fitment	OEM Direct Replacement

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil WCA3604GKC100 condensing unit. The 1176763 contactor is shared across many ICP-family WCA-series condensers and air conditioners. Always verify your existing contactor is a 2-pole, 40A unit with a 24V coil before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter at the contactor line terminals.
Access — Remove the condensing unit service/electrical panel.
Document — Photograph all wire connections before disconnecting anything.
Remove — Label and disconnect the line, load, and 24V coil wires; unscrew the old contactor from the bracket.
Install — Mount the new contactor, then reconnect each wire exactly per your photo (line in, load to compressor/fan, 24V to the coil terminals).
Test — Restore power, call for cooling, and confirm the contacts pull in cleanly and the compressor and fan start.

Signs You Need a Replacement

Outdoor unit won't start even though the thermostat calls for cooling.
Compressor/fan keep running after the thermostat is satisfied (welded contacts).
Loud humming, buzzing, or chattering from the contactor.
Visibly burned, pitted, or melted contact points.

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 2-Pole Contactor for WCA...

$32.95

Frequently Asked Questions

Does this Contactor fit my ICP WCA3604GKC100 — 24V Coil | Ships Today?

Yes. This is the factory-specified OEM contactor for the ICP WCA3604GKC100 — 24V Coil | 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 WCA3604GKC100 — 24V Coil | 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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