What are the specs for this Control Board?

The correct replacement for ICP model WCH4604GKA110 — 24V Heat Pump Board | 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 WCH4604GKA110 — 24V Heat Pump Board | Ships Today.

ICP

ICP Defrost Control Board for WCH4604GKA110 — 24V Heat Pump Board | Ships Today

Name: ICP Defrost Control Board for WCH4604GKA110 — 24V Heat Pump Board | Ships Today
Brand: ICP
SKU: 1173636
Price: 214.50 USD
Availability: InStock

SKU: 1173636 Brand: ICP

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Overview

This OEM defrost control board (part #1173636) is the brain of the outdoor section on your ICP WCH4604GKA110 heat pump. It monitors coil temperature and run time, then initiates and terminates the defrost cycle so frost and ice are cleared from the outdoor coil during heating operation. The board reverses the changeover valve, shuts off the outdoor fan, and switches the unit briefly into cooling mode to melt accumulated ice, then returns to normal heating. It also coordinates compressor timing and 24-volt control signals. When this board fails you may see a heat pump that ices over and never defrosts, a unit stuck in defrost, no outdoor operation, or erratic mode switching. Because it controls the defrost sequence, a failed board can cause both poor heating performance and long-term coil and compressor damage if left unaddressed.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	ICP
Control Voltage	24 VAC
Application	Heat Pump Outdoor Section
Fitment	OEM Replacement

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil WCH4604GKA110 heat pump. Compatible with related ICP-family heat pump models that use this defrost board and the matching defrost thermostat and sensor. Verify the part number and connector layout against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
Access — Remove the condenser control-panel cover.
Document — Photograph every wire and connector on the board before removing anything.
Remove — Unplug the harnesses, release the standoffs or screws, and lift out the old board.
Install — Seat the new board, then reconnect each harness to the matching terminal per your photo.
Test — Restore power, confirm normal heating operation, and verify a defrost cycle initiates and terminates correctly.

Signs You Need a Replacement

Outdoor coil ices over and the unit never defrosts.
Heat pump stuck in defrost or constantly cycling.
No outdoor operation despite a thermostat call.
Poor heating output and frequent lockouts.

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 Defrost Control Board for WC...

$214.50

Frequently Asked Questions

Does this Control Board fit my ICP WCH4604GKA110 — 24V Heat Pump Board | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP WCH4604GKA110 — 24V Heat Pump Board | 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 control board on my ICP WCH4604GKA110 — 24V Heat Pump Board | Ships Today?

Difficulty: Advanced (1–2 hrs)
Step 1: Turn off breaker. Step 2: PHOTOGRAPH all wire connections before touching anything. Step 3: Label each wire with tape. Step 4: Disconnect all wires, remove old board. Step 5: Mount new board, reconnect all wires matching your photo exactly. Step 6: Restore power and test all modes. Exact part number match is critical.

My HVAC system is completely dead. What could be wrong?

Completely dead HVAC (no LED on board) = failed control board or blown fuse. Check board fuse first (3A or 5A, costs $1–$5). If fuse is good and board has power but no LED, board is dead. Always photograph wiring before replacing.

Is this control board 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 control board?

OEM essential. Control boards are model-specific with precise firmware and connector layouts. Aftermarket boards rarely match all functions and can cause intermittent failures or safety issues. Always match the exact OEM part number.

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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