F.83 - No/insufficient temperature change at flow/return sensors

What does F.83 mean?

When the burner starts, the boiler detects no or insufficient temperature change at the flow and/or return temperature sensors, indicating a potential issue with water content or sensor positioning.

• Insufficient water present in the product (low system pressure).
• Flow or return temperature sensor not in the correct position at the pipe.

Click steps to track your progress.

1. 1

   Press the reset button on the boiler display up to three times to try and clear the fault.

2. 2

   Check the system pressure gauge on your boiler and ensure there is sufficient water in the heating system. Top up if necessary.

3. 3

   Contact customer service. This fault suggests the flow or return temperature sensor might be incorrectly positioned or there's an issue with water circulation that requires professional attention.