What are the specs for this Control Board?

The correct replacement for ICP model RGS303STAA0AAAA – OEM 1183618 Integrated 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 RGS303STAA0AAAA – OEM 1183618 Integrated Control | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303STAA0AAAA – OEM 1183618 Integrated Control | Ships Today

Name: ICP Furnace Control Board Kit for RGS303STAA0AAAA – OEM 1183618 Integrated Control | Ships Today
Brand: ICP
SKU: 1183618
Price: 233.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This genuine OEM control board kit, factory part number 1183618, is the integrated furnace control (IFC) that sequences and supervises operation of ICP, Tempstar, Heil, and Comfortmaker gas furnaces such as the RGS303STAA0AAAA. The board manages the inducer, igniter, gas valve, blower timing, and safety circuits, and reads the thermostat call along with limit and flame-sense inputs. Supplied as a complete kit, it includes the board ready for installation. Boards fail from voltage surges, cracked solder joints, burned relays, or moisture — producing no-heat conditions, blinking diagnostic LED fault codes, or a furnace stuck in lockout. A new IFC restores full, code-compliant operation.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board (Kit)
Brand	ICP / Tempstar / Heil / Comfortmaker
Control Voltage	24 VAC
Application	Gas Furnace Sequencing & Safety Control
Fit	OEM Direct Replacement

Compatibility

Direct factory replacement for ICP/Tempstar/Heil/Comfortmaker gas furnaces using OEM control board kit 1183618, including the RGS303STAA0AAAA. Verify the board part number and connector layout against your original before installing.

Installation Guide

Safety First – Disconnect electrical power and shut off gas, then verify zero voltage with a multimeter.
Access – Remove the furnace control/blower compartment service panel.
Document – Photograph every harness connector and wire location before disconnecting.
Remove – Unplug each connector, remove the mounting screws/standoffs, and lift out the old board.
Install – Mount the new board and reconnect each harness to its matching plug per your photo.
Test – Restore gas and power, run a full heat cycle, and confirm the diagnostic LED shows normal operation.

Signs You Need a Replacement

No response to a thermostat heat call
Blinking LED fault/error codes on the board
Visible burn marks, corrosion, or scorched relays
Inducer, igniter, or blower fails to sequence correctly

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 Furnace Control Board Kit fo...

$233.94

Frequently Asked Questions

Does this Control Board fit my ICP RGS303STAA0AAAA – OEM 1183618 Integrated Control | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303STAA0AAAA – OEM 1183618 Integrated 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 RGS303STAA0AAAA – OEM 1183618 Integrated 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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