ICP Furnace Control Board Kit for RGS303HTFA0AAAA – Integrated Ignition Control | Ships Today
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Overview
This OEM integrated furnace control board kit is the brain of the ICP Tempstar Heil RGS303HTFA0AAAA gas furnace. It sequences the entire heating cycle — inducer start, pressure-switch proving, hot surface igniter warm-up, gas valve timing, blower on/off delays, and safety lockouts — while monitoring flame sense and limit circuits. A failed board produces erratic or no-heat behavior: no response to a thermostat call, blower or inducer that won't start, ignition that never times out correctly, or repeated lockouts with no obvious component fault. Look for scorched traces, blown fuses, or burnt relay contacts on the old board. This is OEM part number 1183618 (KIT CONTROL BOARD), supplied as a complete kit for a straightforward swap.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1183618 |
| Type | Integrated Furnace Control Board Kit |
| Brand | ICP / Tempstar / Heil |
| Control Voltage | 24V |
| Line Voltage | 120V |
| Fit | OEM Direct Replacement Kit |
Compatibility
Direct-fit replacement for the ICP Tempstar Heil RGS303HTFA0AAAA furnace and related ICP-family models that call for kit 1183618. ICP, Heil, Tempstar, and Comfortmaker furnaces frequently share control platforms; verify the kit number against your unit before installing.
Installation Guide
- Safety First – Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter.
- Access – Remove the control/blower compartment service panel.
- Document – Photograph every wire and connector on the existing board before disconnecting anything.
- Remove – Label and unplug each harness, then remove the board mounting screws or standoffs.
- Install – Mount the new board, transfer connections one at a time to match your photo, and confirm the line-voltage polarity and ground.
- Test – Restore power, run a full heat cycle, and verify correct ignition sequence and blower timing. Check the diagnostic LED for fault codes.
Signs You Need a Replacement
- No response from the furnace on a thermostat heat call.
- Inducer or blower won't energize despite good motors.
- Random lockouts or scrambled ignition timing.
- Visible burn marks, blown onboard fuse, or pitted relays.
Shipping & Returns
Ships same day on orders placed 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