What are the specs for this Control Board?

The correct replacement for ICP model WPH3364000RKC1 — Defrost & Sequencing | 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 WPH3364000RKC1 — Defrost & Sequencing | Ships Today.

ICP

ICP Control Circuit Board for WPH3364000RKC1 — Defrost & Sequencing | Ships Today

Name: ICP Control Circuit Board for WPH3364000RKC1 — Defrost & Sequencing | Ships Today
Brand: ICP
SKU: WPH3364000RKC1
Price: 194.94 USD
Availability: InStock

SKU: WPH3364000RKC1 Brand: ICP

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Overview

This OEM control circuit board is the electronic brain of your ICP/Tempstar/Heil WPH3364000RKC1 heat pump. It manages the defrost cycle, sequences the compressor and reversing valve, processes 24V thermostat inputs, and protects the system through built-in time delays. When the board fails, symptoms range from a unit that won't run at all, to a heat pump that ices over because it never enters defrost, to erratic switching between heating and cooling. Voltage spikes, moisture, and burnt relays on the board are the usual culprits behind these intermittent, hard-to-diagnose faults.

Specifications

Spec	Value
OEM Part Number	1178001
Type	Defrost / Control Circuit Board
Brand	ICP / Tempstar / Heil
Control Voltage	24V
Function	Defrost, sequencing, time-delay protection
Fitment	OEM Replacement

Compatibility

Built for the ICP WPH3364000RKC1 heat pump and compatible with related Tempstar, Heil, and Comfortmaker models that use the same control board. Match the OEM part number 1178001 and connector layout before installing.

Installation Guide

Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
Access — Remove the control-panel service cover.
Document — Photograph every harness plug and terminal connection before disconnecting.
Remove — Unplug all connectors and unclip or unscrew the failed board from its standoffs.
Install — Seat the new board on the standoffs and reconnect every harness per your photo.
Test — Restore power and verify normal startup, sequencing, and a forced defrost cycle.

Signs You Need a Replacement

Heat pump won't start or randomly shuts down
Outdoor coil ices over because defrost never initiates
Erratic switching between heating and cooling modes
Visible burnt relays or scorch marks 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 Control Circuit Board for WP...

$194.94

Frequently Asked Questions

Does this Control Board fit my ICP WPH3364000RKC1 — Defrost & Sequencing | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP WPH3364000RKC1 — Defrost & Sequencing | 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 WPH3364000RKC1 — Defrost & Sequencing | 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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