What are the specs for this Control Board?

The correct replacement for ICP model RGS303LTAA0AAAA — OEM | 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 RGS303LTAA0AAAA — OEM | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303LTAA0AAAA — OEM | Ships Today

Name: ICP Furnace Control Board Kit for RGS303LTAA0AAAA — OEM | Ships Today
Brand: ICP
SKU: 1183618
Price: 246.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This is a genuine OEM control board kit (part number 1183618) for the ICP/Heil/Tempstar RGS303LTAA0AAAA gas furnace. The integrated furnace control board is the brain of the unit — it sequences ignition, manages the inducer and blower motors, monitors safety switches and flame sense, and runs the diagnostic LED fault codes. When the board fails you may see no response on a heat call, the inducer or blower running constantly, erratic blower behavior, blank or flashing fault codes, or intermittent no-heat lockouts. Supplied as a complete kit, this assembly drops in to replace the original control and restores correct, safe sequencing of the entire heating cycle. Because the board ties together every major component, using the correct OEM kit is critical for reliable operation and proper safety interlocks.

Specifications

Spec	Value
OEM Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP / Heil / Tempstar
Function	Ignition / Blower / Inducer Control & Diagnostics
Application	Gas Furnace
Fits Model	RGS303LTAA0AAAA

Compatibility

Designed for the ICP/Heil/Tempstar/Comfortmaker RGS303LTAA0AAAA gas furnace and other ICP-family units specifying control kit 1183618. Confirm connector layout and harness plugs match your existing board before installing.

Installation Guide

Safety First — Disconnect electrical power and shut off the gas, then verify zero voltage with a multimeter.
Access — Remove the furnace control/blower panel to expose the board.
Document — Photograph every harness plug and wire position before disconnecting anything.
Remove — Unplug each connector, release the mounting standoffs/screws, and lift out the old board.
Install — Mount the new board, reseat every connector firmly per your photo, and confirm none are reversed.
Test — Restore power and gas, run a full heat cycle, and verify ignition, blower, and fault-code LED operate normally.

Signs You Need a Replacement

No response from the furnace on a thermostat heat call.
Inducer or blower motor runs constantly or won't start.
Blank, frozen, or erratic diagnostic LED fault codes.
Intermittent no-heat lockouts that clear on a 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 Furnace Control Board Kit fo...

$246.94

Frequently Asked Questions

Does this Control Board fit my ICP RGS303LTAA0AAAA — OEM | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303LTAA0AAAA — OEM | 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 RGS303LTAA0AAAA — OEM | 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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