Heater display shows erratic or fluctuating water temperature readings

Safety first: Turn OFF power before handling sensor wiring.

• Secure connections: Reseat all temperature sensor connectors at the control board and ensure they are tight.
• Inspect cable routing: Keep sensor wires away from high-voltage lines and pump motor leads to reduce electrical noise.
• Check sensor placement: Ensure the sensor is properly installed in the header or plumbing and fully in contact with water.
• Replace sensor if needed: If readings remain unstable, replace the affected thermistor with a Poolworld-approved part.

Note: Rapid temperature swings on the display without actual water changes usually indicate a sensor or wiring issue.