Pentair 475978 Heater Fan Control Board | ETI 400 Heaters

The Pentair Heater Fan Control Board 475978 is a genuine OEM replacement designed for ETI 400 High-Efficiency Pool and Spa Heaters. Responsible for regulating fan operations, this board ensures the heater functions safely and efficiently by monitoring air flow. With integrated air flow switches, it senses pressure differentials and signals the system when conditions are correct for operation. Built to OEM standards, this board offers durability and seamless compatibility with Pentair ETI 400 heaters. By replacing a worn control board, you restore safe operation, efficiency, and consistent performance to your heating system.

Highlights

• System-Specific OEM Part: Genuine Pentair 475978 fan control board designed for ETI 400 heaters, providing exact fit and reliable function.

• Monitors Air Flow: Uses integrated switches to measure pressure differences, ensuring proper circulation before completing the electrical circuit.

• Safety Assurance: Prevents unsafe operation by only allowing the heater to run when proper air flow is detected.

• Built for Reliability: Constructed with durable OEM-grade materials to Pentair’s specifications for long-term dependable use.

• Easy Installation: Designed for straightforward replacement, integrating seamlessly with ETI 400 heater systems.

• Preserves Efficiency: Helps the heater maintain optimal combustion and energy efficiency by regulating fan operations.

• Critical Maintenance Component: Replacing the board restores safety and reliability, keeping your system operating effectively.

Includes

• (1) Control Board
• (4) Clips

Compatibility

• Pentair ETI 400 Heaters

Additional Info

Need the OEM Pentair Heater Fan Control Board 475978? This section covers installation, system compatibility, and troubleshooting, with emphasis on local pricing and shop availability.

Installing the Pentair 475978 Board

The fan control board manages airflow and combustion safety in ETI 400 heaters. Installation is straightforward and ensures reliable performance.

How do I connect the Pentair 475978 to my ETI 400 system?

Can I check local price and stock before buying the 475978?

Does this board come with mounting clips in local packaging?

Is the 475978 compatible with all ETI 400 heater variations?

Fixing Heater Air Flow Problems

When fan errors occur, the control board may be faulty. Replacing with the OEM 475978 ensures proper blower operation and restores system safety.

Why does my Pentair ETI 400 display airflow fault codes?

Can a bad fan control board prevent the heater from firing?

How can I tell if my 475978 board is defective?

Do local shops offer diagnostics for ETI 400 fan boards?

Local Pricing and Availability

Wholesale Pool Mart offers the 475978 control board at competitive local pricing. Customers can confirm stock before visiting for a faster replacement.

Where can I buy the Pentair 475978 fan board near me?

Does Wholesale Pool Mart carry the lowest local price for this part?

How can I confirm availability before heading over?

Are multiple boards stocked locally for service contractors?

Diagram