ICP Furnace Control Board Kit for RGS120LTAA0AAA — Integrated Ignition Control | Ships Today
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Overview
This is a genuine OEM control board kit (part 1183618) for the ICP / Tempstar / Heil RGS120LTAA0AAA gas furnace. The integrated furnace control board is the brain of the unit: it sequences the inducer, igniter, gas valve, and blower, monitors the limit and pressure switches, runs flame-sense and safety lockout logic, and stores fault codes on its diagnostic LED. When the board fails, the symptoms are wide-ranging — no ignition, blower that runs constantly or not at all, short cycling, or erratic fault codes. Because it ties every major component together, a confirmed board failure should always be replaced with the correct OEM kit to preserve the factory safety timings.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Function | Ignition sequencing, safety & blower control |
| Application | Gas Furnace |
| Fitment | OEM |
Compatibility
The factory-correct integrated control board kit for the ICP / Tempstar / Heil RGS120LTAA0AAA. ICP shared control platforms across several furnace lines, so this kit may service related models — verify the printed board number against your existing board before ordering.
Installation Guide
- Safety First — Disconnect power at the 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.
- Remove — Unplug each connector, release the mounting standoffs, and lift out the failed board.
- Install — Seat the new board on its standoffs and reconnect every plug to the matching keyed terminal per your photo.
- Test — Restore power, run a full heat cycle, and confirm a clean diagnostic LED with no fault codes.
Signs You Need a Replacement
- No response on a heat call — inducer and igniter never start
- Blower runs continuously or never engages
- Random short cycling or inconsistent fault codes
- Visible scorching, burnt relays, or cracked traces 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