What are the specs for this Control Board?

The correct replacement for ICP model RGS303SREA0AAAA — 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 RGS303SREA0AAAA — OEM 1183618 | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303SREA0AAAA — OEM 1183618 | Ships Today

Name: ICP Furnace Control Board Kit for RGS303SREA0AAAA — OEM 1183618 | Ships Today
Brand: ICP
SKU: 1183618
Price: 245.70 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This is a genuine OEM furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS303SREA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it manages the ignition sequence, monitors safety devices like the limit and pressure switches and flame sensor, controls the inducer and blower timing, and communicates fault codes through its diagnostic LED. When the board fails, symptoms range from a completely dead furnace to erratic blower behavior, failure to ignite, or repeated lockouts with no clear cause. This kit includes the replacement board and the hardware needed for a clean swap, restoring proper sequencing and safety monitoring.

Specifications

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

Compatibility

Designed as a direct-fit replacement for the ICP / Tempstar / Heil RGS303SREA0AAAA furnace and related ICP-family equipment specifying OEM part 1183618. Confirm the board part number on your existing control before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the furnace control compartment panel.
Document — Photograph every wire and connector on the board before disconnecting anything — this is critical for a control board.
Remove — Unplug all harness connectors and low-voltage wires, then unfasten the board from its standoffs.
Install — Mount the new board and reconnect each connector exactly per your photo. Set any DIP switches to match the original.
Test — Restore power and run full heat and fan cycles, watching the diagnostic LED for normal operation.

Signs You Need a Replacement

Furnace completely unresponsive with no diagnostic LED activity
Blower runs continuously or won't run at all
Repeated lockouts or fault codes with healthy sensors and switches
Visible scorching, corrosion, or failed relays on the board

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. 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...

$245.70

Frequently Asked Questions

Does this Control Board fit my ICP RGS303SREA0AAAA — OEM 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303SREA0AAAA — 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 RGS303SREA0AAAA — 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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