What are the specs for this Control Board?

The correct replacement for ICP model WCH3184GKA1 — Heat Pump Timer | 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 WCH3184GKA1 — Heat Pump Timer | Ships Today.

ICP

ICP Defrost Control Board for WCH3184GKA1 — Heat Pump Timer | Ships Today

Name: ICP Defrost Control Board for WCH3184GKA1 — Heat Pump Timer | Ships Today
Brand: ICP
SKU: 1173636
Price: 175.44 USD
Availability: InStock

SKU: 1173636 Brand: ICP

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Overview

This is the OEM defrost control board (ICP part 1173636) for the WCH3184GKA1 heat pump. The defrost board is the brain of the outdoor unit's heating-mode operation — it monitors the defrost thermostat and coil temperature, times the defrost interval, energizes the reversing valve coil, and shuts off the outdoor fan to melt frost off the coil before returning to heating. A failed board commonly shows up as a heat pump that ices over, never defrosts, or defrosts constantly. Because it drives the reversing valve and fan relays, board failure can mimic several other component faults.

Specifications

Spec	Value
Part Number	1173636
Type	Defrost Control Board
Brand	ICP / Tempstar / Heil
Control Voltage	24V
Application	Heat Pump Defrost Cycle

Compatibility

Fits the ICP/Tempstar/Heil/Comfortmaker WCH3184GKA1 heat pump condensing unit and related WCH3 series models using defrost board 1173636. Match the part number and connector layout to your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, verify zero voltage with a multimeter.
Access — Remove the condensing unit service panel to reach the control box.
Document — Photograph all wire connections and the defrost timing pin setting before disconnecting.
Remove — Unplug the connectors, transfer wires, and unscrew or unclip the old board from its standoffs.
Install — Mount the new board, set the defrost timer pin to match the original, and reconnect each lead per your photo.
Test — Restore power, initiate a test/forced defrost, and confirm the reversing valve shifts and the outdoor fan cycles correctly.

Signs You Need a Replacement

Outdoor coil ices over and never defrosts
Unit defrosts continuously or at the wrong intervals
No 24V output to the reversing valve or fan relay
Burnt traces, scorch marks, or failed components 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 Defrost Control Board for WC...

$175.44

Frequently Asked Questions

Does this Control Board fit my ICP WCH3184GKA1 — Heat Pump Timer | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP WCH3184GKA1 — Heat Pump Timer | 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 WCH3184GKA1 — Heat Pump Timer | 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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