What are the specs for this Control Board?

The correct replacement for ICP model WCH5424GKA200 — 24V Timed/Demand Defrost | 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 WCH5424GKA200 — 24V Timed/Demand Defrost | Ships Today.

ICP

ICP Heat Pump Defrost Control Board for WCH5424GKA200 — 24V Timed/Demand Defrost | Ships Today

Name: ICP Heat Pump Defrost Control Board for WCH5424GKA200 — 24V Timed/Demand Defrost | Ships Today
Brand: ICP
SKU: 1173636
Price: 155.94 USD
Availability: InStock

SKU: 1173636 Brand: ICP

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Overview

This is the OEM defrost control board (part number 1173636) for the ICP / Heil / Tempstar WCH5424GKA200 heat pump condensing unit. The defrost control board is the brain of the heat pump's defrost cycle. In heating mode, it monitors the outdoor coil temperature and accumulated run time, then initiates a defrost cycle that reverses the system to melt frost and ice off the outdoor coil. It coordinates the reversing valve, condenser fan, and auxiliary heat so the unit defrosts efficiently and resumes heating without damage. When this board fails, the heat pump may ice over completely, fail to defrost, lock into defrost, or stop heating altogether — all common cold-weather no-heat symptoms.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	ICP / Heil / Tempstar
Control Voltage	24V
Function	Timed / demand defrost control
Fitment	OEM replacement

Compatibility

Engineered as a direct OEM replacement for the ICP/Heil/Tempstar WCH5424GKA200 heat pump. The WCH5424 platform is shared across several ICP family brands (Heil, Tempstar, Comfortmaker), so this board fits many units built on the same chassis. Always confirm the part number on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter before touching any wiring.
Access — Remove the control panel cover on the condensing unit.
Document — Photograph every wire and terminal connection before disconnecting anything.
Remove — Label and disconnect the low-voltage and line-voltage leads, then unclip or unscrew the old defrost board from its standoffs.
Install — Mount the new board on the standoffs and reconnect every wire exactly as shown in your photos, matching terminal designations.
Test — Restore power, run the unit in heating mode, and verify a normal defrost cycle initiates and terminates correctly.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts in heating mode
Unit gets stuck in defrost or cycles in and out of defrost rapidly
No heat output even though the compressor and fan run
Visible burn marks, corrosion, or a chemical smell on the board

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 Heat Pump Defrost Control Bo...

$155.94

Frequently Asked Questions

Does this Control Board fit my ICP WCH5424GKA200 — 24V Timed/Demand Defrost | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP WCH5424GKA200 — 24V Timed/Demand Defrost | 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 WCH5424GKA200 — 24V Timed/Demand Defrost | 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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