What are the specs for this Control Board?

The correct replacement for ICP model RGS303LFAA0AAAA — 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 RGS303LFAA0AAAA — OEM 1183618 | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303LFAA0AAAA — OEM 1183618 | Ships Today

Name: ICP Furnace Control Board Kit for RGS303LFAA0AAAA — OEM 1183618 | Ships Today
Brand: ICP
SKU: 1183618
Price: 246.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This is the OEM control board kit (ICP part number 1183618) for the ICP / Tempstar / Heil RGS303LFAA0AAAA gas furnace. The integrated furnace control board is the brain of the unit — it sequences the inducer, igniter, gas valve, and blower while monitoring safety circuits and flame sense. A failed board causes no-heat conditions, blinking diagnostic LED fault codes, blower or inducer that won't run, or random lockouts. This factory kit ships with the components needed for a direct replacement, restoring full sequencing and safety control.

Specifications

Spec	Value
Part Number	1183618
Description	Kit, Control Board
Type	Integrated Furnace Control Board
Brand	ICP / Tempstar / Heil
Application	Gas Furnace Control
Fit	OEM Direct Replacement Kit

Compatibility

Designed for the ICP / Tempstar / Heil RGS303LFAA0AAAA gas furnace and related Heil-built ICP-family models that use this control kit. Confirm the board layout, connector positions, and part number against your existing control before installing.

Installation Guide

Safety First — Disconnect electrical power and shut off the gas supply, then verify zero voltage with a multimeter.
Access — Remove the furnace control/blower compartment service panel.
Document — Photograph every wire harness and connector on the board before disconnecting.
Remove — Unplug each connector, unscrew the board from its standoffs, and lift it out.
Install — Mount the new control board and reconnect every harness exactly per your photo and the wiring diagram.
Test — Restore gas and power, then run a full heat cycle and confirm correct sequencing and no fault codes.

Signs You Need a Replacement

No-heat condition with a blinking LED fault code
Inducer, igniter, or blower fails to energize in sequence
Random lockouts or short-cycling
Visible burn marks, corrosion, or failed relays on the board

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...

$246.94

Frequently Asked Questions

Does this Control Board fit my ICP RGS303LFAA0AAAA — OEM 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303LFAA0AAAA — 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 RGS303LFAA0AAAA — 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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