What are the specs for this Control Board?

The correct replacement for ICP model RGS300LTAA0AAAA — OEM | 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 RGS300LTAA0AAAA — OEM | Ships Today.

ICP

ICP Furnace Control Board Kit for RGS300LTAA0AAAA — OEM | Ships Today

Name: ICP Furnace Control Board Kit for RGS300LTAA0AAAA — OEM | Ships Today
Brand: ICP
SKU: 1183618
Price: 246.94 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This OEM ICP control board kit (part number 1183618) is the integrated furnace control (IFC) that manages the entire heating sequence in your ICP / Heil / Tempstar furnace. The board orchestrates the ignition sequence, sequences the inducer and blower motors, monitors the safety circuit (limits, flame sensor, pressure switches), and stores diagnostic fault codes. When the control board fails, symptoms range from a completely dead furnace to erratic blower behavior, failed ignition sequences, flashing error codes, or a unit that short-cycles. Because the board is the brain of the furnace, a failure here can mimic many other component faults — making a confirmed board replacement the fastest path back to reliable, safe heating. This kit ships as a complete OEM assembly so you replace the board with the exact factory-specified part rather than a generic substitute.

Specifications

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

Compatibility

This control board kit is a direct OEM fit for the ICP / Heil / Tempstar model RGS300LTAA0AAAA and related ICP-family furnaces specifying part 1183618. Verify the part number printed on your existing board and confirm the connector layout before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, and verify zero voltage with a multimeter.
Access — Remove the control/blower compartment service panel.
Document — Photograph every wire harness and connector position on the old board before disconnecting.
Remove — Unplug each connector, release the board's mounting tabs or screws, and lift out the old board.
Install — Mount the new board and reconnect each harness exactly as photographed; set any DIP switches to match the original.
Test — Restore power and run a full heat cycle, confirming proper ignition, blower timing, and no error codes.

Signs You Need a Replacement

Furnace is completely unresponsive with no diagnostic LED activity.
Flashing fault codes pointing to a board or control failure.
Blower or inducer runs erratically or won't shut off.
Repeated ignition lockouts with all other components testing good.

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 RGS300LTAA0AAAA — OEM | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS300LTAA0AAAA — OEM | 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 RGS300LTAA0AAAA — OEM | 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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