Furnace Control Boards

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Furnace Control Boards Explained

The furnace control board acts as the “brain” of your furnace, managing all key functions to keep your home warm and safe.

Carrier Furnace Control Boards

Designed specifically for Carrier furnaces, these control boards ensure smooth startup, operation, and shutdown with reliable performance.

Lennox Furnace Control Boards

Lennox control boards are crafted to optimize heating cycles and energy use, tailored perfectly for Lennox heating systems.

Honeywell Furnace Control Boards

Known for their reliability, Honeywell furnace control boards provide precise control and protection for a wide range of furnace models.

Rheem Furnace Control Boards

Rheem control boards offer dependable management of furnace components, helping prevent malfunctions and improve efficiency.

When to Replace Your Furnace Control Board

If your furnace won’t ignite, runs erratically, or displays error codes, it’s often time to check or replace the control board to restore proper function.

Frequently Asked Questions

Yes, if you have experience with HVAC systems and electrical components. Ensure you purchase a compatible control board and follow proper safety procedures. For guidance, refer to reputable HVAC resources or consult a professional technician.

The total cost typically ranges from $300 to $700, including parts and labor. The control board itself may cost between $50 and $300, with labor charges adding another $150 to $450. Prices can vary based on brand, model, and local labor rates.

With proper maintenance, a furnace control board can last between 10 to 15 years. Regular inspections and timely repairs can help extend its lifespan.

Common causes include power surges, overheating, moisture exposure, and component wear. Regular maintenance and proper installation can help prevent these issues.

To test a furnace control board:

1. For 120V Power:

  • Set your multimeter to AC voltage.
  • Place the probes on the board’s incoming power terminals (usually labeled L and N).
  • A reading of approximately 120V indicates proper power supply.

2. For 24V Power:

  • Set your multimeter to AC voltage.
  • Place the probes on the R (24V hot) and C (common) terminals.
  • A reading of approximately 24V indicates proper low-voltage supply.

If voltages are absent or incorrect, check the transformer and fuses. Always follow safety precautions to avoid electric shock.