What are the specs for this Control Board?

The correct replacement for ICP model RGS303LSAA0AAAA — 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 RGS303LSAA0AAAA — OEM 1183618 Integrated Furnace Control | Ships Today.

ICP

ICP Control Board Kit for RGS303LSAA0AAAA — OEM 1183618 Integrated Furnace Control | Ships Today

Name: ICP Control Board Kit for RGS303LSAA0AAAA — 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 is the genuine OEM control board kit (part number 1183618) for the ICP / Heil / Tempstar RGS303LSAA0AAAA gas furnace. The integrated furnace control board governs the entire heat cycle — it sequences the inducer motor, energizes the igniter, opens the gas valve, monitors flame via the flame sensor, and times the blower on and off. It also watches the safety circuits (limit and pressure switches) and stores diagnostic fault codes on its LED. When the board fails, symptoms include no ignition, short-cycling, a blower that runs nonstop, or flashing error codes. A failed control board is among the most common no-heat causes on this ICP furnace generation. This kit ships complete and ready to install.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP / Heil / Tempstar
Control Voltage	24V
Application	Gas Furnace
Fit	OEM Direct Replacement

Compatibility

Engineered as a direct OEM replacement for the ICP / Heil / Tempstar RGS303LSAA0AAAA furnace and related models in the same series using control board 1183618. Always confirm the part number printed on your existing board before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage 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 and connectors, remove the mounting screws, and lift out the failed control board.
Install — Mount the new 1183618 board, then reconnect each harness exactly as shown in your photos.
Test — Restore power and run a full heat cycle, confirming ignition, blower operation, and no fault codes.

Signs You Need a Replacement

Furnace will not ignite or produces no heat at all.
Blower runs continuously or fails to start.
Flashing diagnostic LED fault codes on the board.
Visible burn marks, corrosion, or scorched 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 Control Board Kit for RGS303...

$245.70

Frequently Asked Questions

Does this Control Board fit my ICP RGS303LSAA0AAAA — OEM 1183618 Integrated Furnace Control | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303LSAA0AAAA — 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 RGS303LSAA0AAAA — 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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