What are the specs for this Control Board?

The correct replacement for ICP model RGS120LTBA0AAA — OEM 1183618 Furnace Control | 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 RGS120LTBA0AAA — OEM 1183618 Furnace Control | Ships Today.

ICP

ICP Control Board Kit for RGS120LTBA0AAA — OEM 1183618 Furnace Control | Ships Today

Name: ICP Control Board Kit for RGS120LTBA0AAA — OEM 1183618 Furnace Control | 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 ICP OEM control board kit (part number 1183618) for the RGS120LTBA0AAA gas furnace. The integrated furnace control board is the brain of your heating system — it manages the ignition sequence, monitors the flame sensor and pressure switches, sequences the inducer and blower motors, and enforces all safety lockouts. When the board fails, the furnace may fail to ignite, short-cycle, run the blower continuously, or stop responding to the thermostat entirely. Replacing the board with a genuine OEM unit restores correct timing and protects every other component in the appliance.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board (Kit)
Brand	ICP (Heil / Tempstar / Comfortmaker)
Control Voltage	24V
Fits Model	RGS120LTBA0AAA
Fitment	OEM Direct Replacement

Compatibility

Designed as a direct-fit replacement for the ICP / Heil / Tempstar / Comfortmaker RGS120LTBA0AAA gas furnace. The kit ships with the mounting hardware and connector adapters needed for a clean swap. Always verify the printed part number on your existing board matches 1183618 before installing.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the furnace control/blower access panel.
Document — Photograph every wire and connector position before disconnecting anything.
Remove — Unplug each harness from the old board, release the mounting standoffs/screws, and lift the failed board out.
Install — Mount the new board on the same standoffs and reconnect every harness exactly per your photos.
Test — Restore power, call for heat, and confirm the full ignition sequence and blower operation; check the diagnostic LED for fault codes.

Signs You Need a Replacement

Furnace will not ignite or has no response to the thermostat.
Blower runs constantly or never starts.
Repeated short-cycling or random lockouts.
Visible scorching, burnt traces, or a blinking error code 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 Control Board Kit for RGS120...

$246.94

Frequently Asked Questions

Does this Control Board fit my ICP RGS120LTBA0AAA — OEM 1183618 Furnace Control | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS120LTBA0AAA — OEM 1183618 Furnace Control | 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 RGS120LTBA0AAA — OEM 1183618 Furnace Control | 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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