Boiler shows E1 260, often with erratic temperature readings.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Stuck or blocked flow turbine, Scale or debris in cold inlet filter, Faulty flow sensor, Wiring fault to sensor

Safety first: Turn off power and isolate the cold water supply before removing any water components.

Clean inlet filter: On combi models, remove and clean the cold water inlet filter to the plate heat exchanger.
Engineer tasks: A technician should inspect and clean or replace the flow turbine assembly, check sensor wiring, and descale the DHW circuit if necessary.

Medium 3/5

DHW Flow Sensor / Turbine

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