What are the specs for this Control Board?

The correct replacement for ICP model RGS243LFAA0AAAA — 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 RGS243LFAA0AAAA — OEM 1183618 | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS243LFAA0AAAA — OEM 1183618 | Ships Today

Name: ICP Furnace Control Board Kit for RGS243LFAA0AAAA — OEM 1183618 | Ships Today
Brand: ICP
SKU: 1183618
Price: 246.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This is the genuine OEM control board kit (part number 1183618) for the ICP / Heil / Tempstar RGS243LFAA0AAAA gas furnace. The integrated furnace control board is the brain of the furnace — it manages the ignition sequence, blower and inducer timing, safety lockouts, and diagnostics. When the board fails, you may see no response to a thermostat call, blower or inducer motors that won't start, erratic cycling, or fault codes that don't clear. Replacing a faulty control board restores proper sequencing and safe operation. This kit ships as a direct-fit replacement with the correct connectors for the RGS-series furnace.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP / Heil / Tempstar
Fits Model	RGS243LFAA0AAAA
Fit	OEM Direct Replacement
Application	Gas Furnace Control / Ignition Sequencing

Compatibility

Designed for the ICP / Heil / Tempstar RGS243LFAA0AAAA gas furnace and related Comfortmaker-family RGS-series units using the same control platform. Match OEM part number 1183618 and verify the connector layout against your existing board before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker. Verify zero voltage with a multimeter before touching any wiring.
Access — Remove the furnace control/blower compartment panel to expose the board.
Document — Photograph every wire and connector position on the old board before disconnecting.
Remove — Unplug all harness connectors, remove the mounting screws/standoffs, and lift out the old control board.
Install — Mount the new board, then reconnect each harness exactly per your photo and the wiring diagram.
Test — Restore power, initiate a heat call, and confirm the full sequence: inducer, igniter, gas valve, flame proving, and blower all operate in order.

Signs You Need a Replacement

Furnace is completely unresponsive to a thermostat heat call.
Inducer or blower motor won't energize even with proper voltage present.
Repeated lockouts or fault codes that persist after resetting power.
Visible scorch marks, burnt traces, or a blown fuse on the existing 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 RGS243LFAA0AAAA — OEM 1183618 | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS243LFAA0AAAA — 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 RGS243LFAA0AAAA — 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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