What are the specs for this Control Board?

The correct replacement for ICP model RHS243S0CA0AAAA — 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 RHS243S0CA0AAAA — 24V Heat Pump Board | Ships Today.

ICP

ICP Defrost Control Board Kit for RHS243S0CA0AAAA — 24V Heat Pump Board | Ships Today

Name: ICP Defrost Control Board Kit for RHS243S0CA0AAAA — 24V Heat Pump Board | Ships Today
Brand: ICP
SKU: 1183618
Price: 214.50 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This OEM control board kit (part 1183618) is the brain of the ICP (Tempstar/Heil) RHS243S0CA0AAAA heat pump. It manages the defrost cycle, compressor timing, reversing-valve switching, and outdoor fan operation based on inputs from the thermostat and defrost sensor. When the board fails the unit may stop heating or cooling, get stuck in or skip defrost, ice over in winter, or fail to energize the compressor entirely. The kit ships with the replacement board and mounting hardware for a direct OEM swap.

Specifications

Spec	Value
Part Number	1183618
Type	Control Board Kit (Defrost/Timer)
Brand	ICP (Tempstar / Heil)
Control Voltage	24V
Application	Heat Pump

Compatibility

Designed for the ICP RHS243S0CA0AAAA heat pump and compatible Tempstar, Heil, and Comfortmaker heat-pump condensers using the same 24V control platform. Verify your existing board's part number or connector layout before ordering.

Installation Guide

Safety First — Disconnect power at the disconnect and breaker, verify zero voltage with a multimeter.
Access — Remove the condenser control-box service panel.
Document — Photo every plug, harness, and terminal on the old board before disconnecting.
Remove — Unplug the wiring harnesses and sensor leads, then remove the board from its standoffs.
Install — Mount the new board, reconnect each harness per your photo, and seat the defrost sensor lead fully.
Test — Restore power, run a heat and cool cycle, and confirm defrost initiates and terminates normally.

Signs You Need a Replacement

Unit ices over and never defrosts
No compressor or outdoor fan operation on a valid call
Stuck in continuous defrost or short-cycling
Visible burn marks or corrosion on the board traces

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 Kit fo...

$214.50

Frequently Asked Questions

Does this Control Board fit my ICP RHS243S0CA0AAAA — 24V Heat Pump Board | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RHS243S0CA0AAAA — 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 RHS243S0CA0AAAA — 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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