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Heatline Fault Codes

Select a fault code to see its meaning, common causes and how to fix it.

• F00 The F00 code appears when your Heatline boiler's control board (PCB) cannot receive a valid temperature reading from… Read more →
• F11 The F11 code on a Heatline boiler indicates that the control board has detected a problem with the return heating… Read more →
• F20 The F20 code on a Heatline boiler means the unit has overheated and the internal safety thermal cut-out has triggered.… Read more →
• F22 The F22 code appears when your Heatline boiler detects that the water pressure inside the sealed heating system has… Read more →