Wiser by Drayton Hydraulic Imbalance or TRV Flow Noise

Radiator with Wiser TRV is noisy (whistling or rushing water) when heating is on.

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

System flow rate too high, TRV throttling flow excessively, Pump speed set too high, Incorrect balancing of radiators

Safety: Radiators and pipes may be hot.

Adjust setpoint: Slightly lower the room setpoint to reduce valve throttling and see if noise reduces.
Check valve orientation: Ensure the TRV is installed on the correct flow or return side as recommended by the valve manufacturer.
Balance system: Have a heating engineer balance the radiators and adjust pump speed to reduce excessive flow.

If noise persists only on one radiator, the valve body may be unsuitable or faulty and may need replacement.

Medium 3/5

Wiser Radiator Thermostat

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