What are the specs for this Control Board?

The correct replacement for ICP model RGS121LECA0AAA – Furnace Control Module | 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 RGS121LECA0AAA – Furnace Control Module | Ships Today.

ICP

ICP Control Board Kit for RGS121LECA0AAA – Furnace Control Module | Ships Today

Name: ICP Control Board Kit for RGS121LECA0AAA – Furnace Control Module | Ships Today
Brand: ICP
SKU: 1183618
Price: 245.70 USD
Availability: InStock

SKU: 1183618 Brand: ICP

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Overview

This is the OEM integrated furnace control board kit (part number 1183618) for the ICP / Tempstar / Heil RGS121LECA0AAA gas furnace. The control board is the brain of your furnace — it manages the ignition sequence, monitors safety limit and flame signals, sequences the inducer motor, gas valve, and blower, and reports fault codes through its diagnostic LED. When the board fails, your furnace may stop responding to thermostat calls, lock out on ignition, short-cycle, or run the blower continuously. This factory kit includes the replacement board so you can restore full, reliable operation rather than chasing intermittent symptoms.

Specifications

Spec	Value
Part Number	1183618
Type	Integrated Furnace Control Board Kit
Brand	ICP (Tempstar / Heil / Comfortmaker)
Control Voltage	24V
Fits Model	RGS121LECA0AAA
Fitment	OEM Direct Replacement

Compatibility

Engineered as a direct-fit replacement for the ICP-family RGS121LECA0AAA gas furnace and is sold under the Tempstar, Heil, and Comfortmaker badges that share this chassis. Always confirm your existing board part number (1183618) before ordering.

Installation Guide

Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
Access — Remove the furnace blower/control compartment door.
Document — Photograph every wire and connector location on the old board before disconnecting anything.
Remove — Unplug the low-voltage and line-voltage harnesses, release the board mounting standoffs/screws, and lift the old board out.
Install — Seat the new board on the standoffs, reconnect each harness exactly per your photos, and confirm no pins are bent.
Test — Restore power, initiate a heat call, and watch the diagnostic LED for a steady/normal code through a full ignition cycle.

Signs You Need a Replacement

Furnace does not respond to thermostat heat calls.
Inducer or blower fails to start, or blower runs nonstop.
Repeated ignition lockouts or flashing fault codes on the board LED.
Visible burn marks, corrosion, or a tripped onboard fuse.

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 RGS121...

$245.70

Frequently Asked Questions

Does this Control Board fit my ICP RGS121LECA0AAA – Furnace Control Module | Ships Today?

Yes. This is the factory-specified OEM control board for the ICP RGS121LECA0AAA – Furnace Control Module | 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 RGS121LECA0AAA – Furnace Control Module | 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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