What are the specs for this Control Board?

The correct replacement for ICP model RHS181H0BA0AAAA — OEM Defrost Control | 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 RHS181H0BA0AAAA — OEM Defrost Control | Ships Today.

ICP

ICP Control Board Kit for RHS181H0BA0AAAA — OEM Defrost Control | Ships Today

Name: ICP Control Board Kit for RHS181H0BA0AAAA — OEM Defrost Control | Ships Today
Brand: ICP
SKU: 1183618
Price: 220.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This OEM control board kit (1183618) is the electronic brain of your ICP Tempstar/Heil RHS181H0BA0AAAA heat pump. It manages defrost timing, reversing-valve sequencing, compressor staging, and safety lockouts, coordinating the 24V control signals from the thermostat with the high-voltage contactors. A failed board is a common cause of erratic operation — symptoms include a unit stuck in defrost, no compressor output, the heat pump failing to reverse between heating and cooling, or no response at all to a thermostat call. The kit ships complete with mounting hardware for a clean replacement.

Specifications

Spec	Value
OEM Part Number	1183618
Type	Control Board Kit (defrost/sequencing)
Brand	ICP (Tempstar / Heil)
Control Voltage	24V
Application	Heat pump defrost control

Compatibility

Engineered as a direct OEM fit for the ICP Tempstar/Heil RHS181H0BA0AAAA heat pump and related RHS181 series units using this defrost control platform.

Installation Guide

Safety First — Disconnect power and verify zero voltage with a multimeter.
Access — Remove the control-box service panel.
Document — Photograph every wire and connector position before disconnecting.
Remove — Unplug the harnesses and unscrew the old board from its standoffs.
Install — Mount the new board and reconnect each harness per your photo and the wiring legend.
Test — Restore power and confirm proper startup, defrost, and reversing-valve operation.

Signs You Need a Replacement

Unit stuck in or never entering defrost
No compressor or fan output on a valid call
Heat pump won't switch between heating and cooling
No response at all to the thermostat

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 Board Kit for RHS181...

$220.94

Frequently Asked Questions

Does this Control Board fit my ICP RHS181H0BA0AAAA — OEM Defrost Control | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RHS181H0BA0AAAA — OEM Defrost Control | 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 RHS181H0BA0AAAA — OEM Defrost Control | 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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