What are the specs for this Control Board?

The correct replacement for ICP model RGS243LRFA0AAAA — OEM Kit 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 RGS243LRFA0AAAA — OEM Kit 1183618 | Ships Today.

ICP

ICP Furnace Control Board for RGS243LRFA0AAAA — OEM Kit 1183618 | Ships Today

Name: ICP Furnace Control Board for RGS243LRFA0AAAA — OEM Kit 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 control board kit (part number 1183618) for the ICP/Tempstar/Heil RGS243LRFA0AAAA gas furnace. The integrated furnace control board is the brain of the system — it sequences the inducer, igniter, gas valve, and blower, monitors safety circuits and limit switches, and reads the thermostat call for heat. When the board fails, the furnace may be completely dead, may run the blower without heating, may short-cycle, or may flash diagnostic fault codes through its onboard LED. Boards commonly fail from voltage surges, blown onboard fuses, burned relays, or corroded traces. This kit includes the replacement board so you can restore reliable operation in a single service visit.

Specifications

Spec	Value
Part Number	1183618
Description	Kit, Control Board
Type	Integrated Furnace Control Board
Brand	ICP / Tempstar / Heil
Fit	OEM Direct Replacement Kit
Compatible Model	RGS243LRFA0AAAA
Application	Gas Furnace Control

Compatibility

Designed as a direct-fit OEM replacement kit for the ICP/Tempstar/Heil RGS243LRFA0AAAA gas furnace. ICP builds under several brand labels (Tempstar, Heil, Comfortmaker, Arcoaire) on shared platforms, so this kit also services equivalent furnaces. Verify part number 1183618 and the existing board's connector layout before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, and shut off the gas. Verify zero voltage with a multimeter.
Access — Remove the control/blower-compartment service panel.
Document — Photograph every wire and connector on the existing board before disconnecting anything.
Remove — Unplug all harness connectors and remove the board mounting screws or standoffs.
Install — Mount the new board and reconnect each connector exactly per your photos. Confirm the thermostat and line-voltage leads are correct.
Test — Restore gas and power, run a full heat cycle, and verify the inducer, igniter, gas valve, and blower sequence correctly.

Signs You Need a Replacement

Furnace completely unresponsive to a heat call
Blower runs but no ignition sequence begins
Persistent or erratic LED fault codes
Visible burned relays, scorched traces, or a blown onboard fuse

Shipping & Returns

Ships same day on orders placed 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 for RG...

$245.70

Frequently Asked Questions

Does this Control Board fit my ICP RGS243LRFA0AAAA — OEM Kit 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS243LRFA0AAAA — OEM Kit 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 RGS243LRFA0AAAA — OEM Kit 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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