What are the specs for this Control Board?

The correct replacement for ICP model RGS303HEAA0AAAA — 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 RGS303HEAA0AAAA — OEM 1183618 | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303HEAA0AAAA — OEM 1183618 | Ships Today

Name: ICP Furnace Control Board Kit for RGS303HEAA0AAAA — OEM 1183618 | Ships Today
Brand: ICP
SKU: 1183618
Price: 227.50 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This OEM control board kit (part 1183618) is the integrated furnace control (IFC) for the ICP Tempstar Heil RGS303HEAA0AAAA. The board is the brain of the furnace — it manages the ignition sequence, monitors safety switches and flame sensing, sequences the inducer and blower, and communicates with the thermostat. When the control board fails, the furnace may not respond to a call for heat, lock out repeatedly, run the blower constantly, or display fault/flash codes through its diagnostic LED. Supplied as a complete kit for a direct OEM replacement, it restores correct timing, safety supervision, and reliable furnace operation.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP / Tempstar / Heil
Application	Gas Furnace Ignition & Sequencing Control
Fit	OEM Replacement

Compatibility

Engineered for the ICP Tempstar Heil RGS303HEAA0AAAA and related ICP/Heil/Tempstar/Comfortmaker furnaces using this control board. Verify the OEM part number and connector layout against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the switch and breaker; verify zero voltage with a multimeter.
Access — Remove the furnace control/blower compartment panel.
Document — Photograph every connector and wire harness position before disconnecting.
Remove — Unplug each harness, release the mounting standoffs/screws, and lift out the old board.
Install — Seat the new OEM board, refasten it, and reconnect every harness to the matching plug per your photo.
Test — Restore power, start a heating call, and confirm the full sequence (inducer, igniter, gas valve, blower) and a normal LED status.

Signs You Need a Replacement

No response to a thermostat call for heat
Repeated lockouts or erratic flash/fault codes
Blower runs continuously or fails to start
No power to the igniter, inducer, or gas valve despite a valid call

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...

$227.50

Frequently Asked Questions

Does this Control Board fit my ICP RGS303HEAA0AAAA — OEM 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303HEAA0AAAA — 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 RGS303HEAA0AAAA — 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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