ICP Furnace Control Board Kit for RGS120HTAB0AAA — OEM Replacement | Ships Today
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Overview
This is the genuine OEM control board kit (Part No. 1183618) for the ICP/Tempstar/Heil RGS120HTAB0AAA gas furnace. The integrated furnace control board is the brain of the appliance — it sequences the inducer, igniter, gas valve, and blower, monitors the flame sensor and pressure switch safeties, and flashes diagnostic fault codes. When the board fails, the entire furnace goes down. Common failure symptoms include a completely dead furnace with no response to a heat call, a thermostat that powers up but the unit never sequences, no blower or inducer operation, erratic or random short cycling, and diagnostic LEDs that are dark or stuck on an error code. Boards commonly fail from power surges, a failed transformer, condensate or rodent damage, or burnt relays and cracked solder joints. This kit ships with the mounting hardware and instructions needed for a clean swap.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition Sequencing & Safety Control |
| Includes | Control Board + Mounting Hardware |
| Fitment | OEM Replacement |
Compatibility
Exact OEM-fit kit for the ICP RGS120HTAB0AAA and the matching Tempstar, Heil, and Comfortmaker furnaces built on the same chassis. Verify the board's part number and connector layout against your existing control before installing.
Installation Guide
- Safety First — Disconnect power at the furnace switch/breaker and verify zero voltage with a multimeter.
- Access — Remove the control-compartment service panel.
- Document — Photograph every harness plug and terminal on the old board before unplugging anything.
- Remove — Unplug each connector, remove the mounting screws/standoffs, and lift out the failed board.
- Install — Mount the new board, transfer each connector to the matching terminal exactly per your photo, and set any model-specific jumpers/dip switches.
- Test — Restore power and run a full heat cycle, confirming inducer, igniter, gas valve, and blower sequence correctly with no fault codes.
Signs You Need a Replacement
- Furnace is completely dead and ignores the heat call
- No inducer, igniter, or blower sequencing
- Random short cycling or lockouts with no clear cause
- Dark, frozen, or error-flashing diagnostic LED
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