ICP Integrated Furnace Control Board Kit for RGS120LSAB0AAA — OEM Module | Ships Today
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Overview
This OEM integrated furnace control board kit (part #1183618) is the brain of your ICP/Tempstar/Heil RGS120LSAB0AAA gas furnace. It sequences the ignition cycle, energizes the inducer and hot surface igniter, opens the gas valve, monitors flame sensing, and times the blower on and off delays — all while enforcing safety lockouts. When the board fails, the furnace can fail to start, lock out after a few tries, run the blower continuously, or short-cycle. Most boards flash a diagnostic LED code that pins down the fault before replacement.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Control Voltage | 24V |
| Functions | Ignition, Blower Timing, Flame Sensing, Safety Lockout |
| Brand | ICP (Tempstar / Heil / Comfortmaker) |
Compatibility
Direct OEM fit for the ICP RGS120LSAB0AAA furnace and equivalent Tempstar, Heil, and Comfortmaker chassis. Match the board's part number and connector layout to your existing control 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 control-compartment panel.
- Document — Photograph every plug, terminal, and wire color on the old board before disconnecting.
- Remove — Unplug each harness, release the standoffs or screws, and lift out the failed board.
- Install — Mount the new board on the same standoffs and reconnect each harness to the matching terminal per your photo.
- Test — Restore power and run a full heat cycle, confirming proper ignition, flame proof, and blower timing.
Signs You Need a Replacement
- Furnace won't start or repeatedly locks out
- Blower runs constantly or won't run at all
- Diagnostic LED flashing a hard fault code
- Short cycling or no response to a thermostat call
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