Dimplex Minimum Flow Threshold Too High

Water heater only works when more than one hot tap is open

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

Flow sensor calibration drift, Partially blocked inlet filter, Incorrectly sized flow restrictor, Low supply pressure

Safety: Turn off power and water before removing filters.

Clean inlet filter: Remove and clean the cold inlet filter to reduce restriction.
Check supply pressure: Measure static and dynamic pressure. Install a booster pump if pressure is below Dimplex minimum.
Inspect flow sensor: Replace the flow sensor if it fails to detect low flows.

Medium 3/5

Flow Sensor / Inlet Filter

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