Ferroli Restricted Hot Water Flow

Hot water flow rate is very low compared to cold water taps.

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

Blocked inlet filter on Ferroli heater, Scaled plate heat exchanger, Partially closed isolation valve, Debris in hot outlet pipe

Safety: Turn off water supply before removing filters or pipework.

1. Compare taps: Check multiple hot taps to confirm the restriction is at the heater, not a single fixture.
2. Clean inlet filter: Remove and clean the cold inlet filter on the Ferroli unit.
3. Check valves: Ensure all isolation valves on the heater’s inlet and outlet are fully open.
4. Descale plate heat exchanger: Have a technician chemically clean or replace the plate heat exchanger if it is heavily scaled.

Medium 3/5

Plate Heat Exchanger

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