475978 | Pentair Heater Fan Control Board For ETI 400 Heaters

The Pentair 475978 Heater Fan Control Board is an OEM replacement part designed for ETI 400 High-Efficiency Pool and Spa Heaters. This board plays a critical role in managing fan operations, ensuring the heater runs safely and efficiently by monitoring air flow through the system. Equipped with air flow switches, it senses pressure differentials and signals the control board when proper circulation is achieved, protecting the heater from unsafe conditions. Built to Pentair’s original specifications, the OEM fan control board integrates seamlessly with existing systems, supporting precise temperature control and reliable performance. Its durable construction makes it a vital replacement for maintaining the efficiency and longevity of your ETI 400 heater.

Highlights

• OEM Replacement Board: Pentair 475978 fan control board is engineered for ETI 400 heaters, ensuring proper integration and dependable performance.

• Air Flow Monitoring: Features built-in air flow switches that sense pressure differences, completing the circuit only when safe air flow is detected.

• Supports Efficiency & Safety: Maintains proper combustion conditions by regulating fan operations, contributing to heater efficiency and user safety.

• Durable OEM Construction: Manufactured from quality materials that meet Pentair standards, offering long-lasting reliability under continuous use.

• Straightforward Installation: Designed for easy replacement, allowing the board to integrate seamlessly into existing ETI 400 heater setups.

• Critical Heater Functionality: Ensures heating operations are not compromised by improper air flow, protecting system integrity.

• Enhances System Longevity: By regulating safe fan operation, it helps extend the life of the ETI 400 heating system.

Includes

• (1) Control Board
• (4) Clips

Compatibility

• Pentair ETI 400 Heaters

Additional Info

Looking for the OEM Pentair Heater Fan Control Board 475978 for ETI 400 heaters? This section explains installation, airflow troubleshooting, and replacement details for customers shopping in store.

Installing the Pentair 475978 Control Board

The board integrates into ETI 400 heaters to regulate fan operation and monitor airflow. Proper installation ensures safe heater function and efficient combustion.

How do I install the Pentair 475978 fan control board in my ETI 400?

Can I buy the 475978 control board today at Discount Pool Mart?

Do I need tools or wiring adjustments for replacement?

Is the 475978 board pre-configured for ETI 400 models?

Troubleshooting Air Flow and Fan Issues

If your heater fails to ignite or shuts down, a faulty control board may be the cause. Replacing with the 475978 restores reliable fan operation and airflow safety.

Why is my ETI 400 heater shutting off with airflow errors?

Can a defective fan control board stop the blower from running?

How do I test the 475978 before confirming replacement?

Does Discount Pool Mart stock the 475978 board for urgent repairs?

Finding the Right Part In Store

The 475978 is a genuine Pentair OEM board designed for ETI 400 heaters. Having the SKU ensures fast identification at the service counter.

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

Can I confirm store stock before heading in?

Is the board packaged with clips when purchased in store?

Is this part available year-round for ETI 400 owners?

Diagram