What are the specs for this Control Board?

The correct replacement for ICP model RGS303SFFA0AAAA — OEM Replacement | 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 RGS303SFFA0AAAA — OEM Replacement | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS303SFFA0AAAA — OEM Replacement | Ships Today

Name: ICP Furnace Control Board Kit for RGS303SFFA0AAAA — OEM Replacement | 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 (ICP part number 1183618) for the ICP/Tempstar/Heil RGS303SFFA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it manages the ignition sequence, monitors safety inputs from the pressure switch, limit, and flame sensor, and times the inducer and blower on and off. When the board fails the furnace may not respond to the thermostat, lock out repeatedly, leave the blower running, or throw inconsistent diagnostic fault codes. This kit includes the replacement board for a clean, reliable restoration of full furnace operation.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP / Tempstar / Heil
Fitment	OEM
Function	Ignition, Safety & Blower Timing Control

Compatibility

A direct-fit replacement for the ICP/Tempstar/Heil RGS303SFFA0AAAA. ICP, Tempstar, Heil, and Comfortmaker furnaces share control platforms, so this board kit also services many sibling RGS-series units. Confirm your existing board carries part number 1183618 before ordering, and match the connector layout to your unit.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the control compartment panel to expose the existing board.
Document — Photograph every wire harness and plug location on the old board before disconnecting — this is critical for a control board.
Remove — Unplug each connector, release the mounting screws or standoffs, and lift the old board out.
Install — Mount the new board and reconnect every harness to its matching plug per your photos. Set any DIP switches or jumpers to match the original.
Test — Restore power and run a full heat cycle, confirming proper ignition, blower timing, and no fault codes on the diagnostic LED.

Signs You Need a Replacement

Furnace is completely unresponsive to thermostat calls
Blower runs continuously or fails to start on a heat call
Repeated lockouts or erratic, inconsistent diagnostic fault codes
Visible burn marks, corrosion, or a blown fuse 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 RGS303SFFA0AAAA — OEM Replacement | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS303SFFA0AAAA — OEM Replacement | 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 RGS303SFFA0AAAA — OEM Replacement | 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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