What are the specs for this Control Board?

The correct replacement for ICP model RGS303HSEA0AAAA — OEM 1183618 | 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 RGS303HSEA0AAAA — OEM 1183618 | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303HSEA0AAAA — OEM 1183618 | Ships Today

Name: ICP Furnace Control Board Kit for RGS303HSEA0AAAA — OEM 1183618 | Ships Today
Brand: ICP
SKU: 1183618
Price: 240.50 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This genuine OEM control board kit (part number 1183618) is the integrated furnace control for the ICP / Tempstar / Heil RGS303HSEA0AAAA gas furnace. The control board is the brain of the furnace: it manages the ignition sequence, sequences the inducer and blower motors, monitors safety limits and pressure switches, reads flame sense, and communicates with the thermostat. A failed board produces some of the most frustrating no-heat symptoms because it can mimic almost any other component failure. Supplied as a complete kit, this replacement restores correct timing, diagnostics (LED fault codes), and safe operation. Because the board governs every aspect of the heating cycle, installing the correct OEM part is essential for reliable performance and safety.

Specifications

Spec	Value
Part Number	1183618
Description	Kit, Control Board
Type	Integrated Furnace Control (IFC)
Brand	ICP (Tempstar / Heil / Comfortmaker)
Fitment	OEM Direct Replacement Kit
Application	Gas Furnace Ignition & Blower Control

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil RGS303HSEA0AAAA gas furnace. ICP-family brands (Heil, Tempstar, Comfortmaker, Arcoaire, KeepRite) often share control platforms; verify the exact part number printed on your existing board before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter before touching the board.
Access — Remove the blower-compartment service panel to expose the control board.
Document — Photograph every wire harness and terminal connection before disconnecting anything.
Remove — Unplug all connectors, release the mounting standoffs or screws, and lift out the old board.
Install — Mount the new board on the same standoffs and reconnect every harness exactly per your photos.
Test — Restore power, run a full heat cycle, and confirm the diagnostic LED shows normal operation with no fault codes.

Signs You Need a Replacement

Furnace completely dead or no response to thermostat
Inducer or blower will not start, or runs continuously
Erratic short-cycling or random ignition lockouts
Diagnostic LED off, solid, or flashing a hard-fault code

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...

$240.50

Frequently Asked Questions

Does this Control Board fit my ICP RGS303HSEA0AAAA — OEM 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303HSEA0AAAA — OEM 1183618 | 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 RGS303HSEA0AAAA — OEM 1183618 | 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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