What are the specs for this Control Board?

The correct replacement for ICP model RGS120HSCA0AAA — OEM 1183618 Integrated Furnace 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 RGS120HSCA0AAA — OEM 1183618 Integrated Furnace Control | Ships Today.

ICP

ICP Control Board Kit for RGS120HSCA0AAA — OEM 1183618 Integrated Furnace Control | Ships Today

Name: ICP Control Board Kit for RGS120HSCA0AAA — OEM 1183618 Integrated Furnace Control | Ships Today
Brand: ICP
SKU: 1183618
Price: 245.70 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This OEM control board kit (part number 1183618) is the integrated furnace control (IFC) for the ICP Tempstar Heil RGS120HSCA0AAA gas furnace. The board manages the complete ignition and operating sequence — it controls the inducer motor, hot surface igniter, gas valve timing, blower on/off delays, and safety lockouts. It continuously monitors flame sense, pressure switch, and limit inputs, and reports faults through an on-board diagnostic LED. When this 24V control board fails, the furnace typically will not start, runs erratically, short-cycles, or throws a diagnostic flash code. Because it is the brain of the appliance, a failed control board is one of the most common no-heat service calls.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP (Tempstar / Heil)
Fits Model	RGS120HSCA0AAA
Control Voltage	24V
Application	Gas Furnace Ignition & Blower Control

Compatibility

Designed as a direct OEM replacement for the ICP Tempstar Heil RGS120HSCA0AAA gas furnace. ICP-family equipment (Tempstar, Heil, Comfortmaker, Arcoaire) frequently shares control hardware across model lines — always confirm the printed part number 1183618 against the board currently in your unit before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage at the board with a multimeter.
Access — Remove the furnace blower-compartment service panel.
Document — Photograph every wire and connector on the existing board before disconnecting anything.
Remove — Unplug the wiring harnesses, remove the mounting screws/standoffs, and lift out the old control board.
Install — Mount the new 1183618 board, then reconnect each harness exactly as shown in your photos.
Test — Restore power, initiate a heat call, and confirm the full ignition sequence completes with no fault flash codes.

Signs You Need a Replacement

Furnace is completely dead with no response to a thermostat call for heat.
Diagnostic LED is off, solid, or flashing a hard-lockout fault code.
Inducer, igniter, or blower fail to energize in the correct sequence.
Intermittent short-cycling or random shutdowns that clear after a power reset.

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 RGS120...

$245.70

Frequently Asked Questions

Does this Control Board fit my ICP RGS120HSCA0AAA — OEM 1183618 Integrated Furnace Control | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS120HSCA0AAA — OEM 1183618 Integrated Furnace 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 RGS120HSCA0AAA — OEM 1183618 Integrated Furnace 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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