Drayton controls-thermostats — Drayton Wiser multi-zone heating systems using a heat hub with room thermostats and smart radiator thermostats Error Codes Directory

Drayton Wiser: one cold room when the rest of the house is warm

A Wiser system asks the boiler for heat only when at least one room wants it, and then opens that room's radiator valves. A single cold room therefore means either that room is not asking, or it is asking and its valve is not opening, and those are separate faults with separate fixes. Applies to: Drayton Wiser multi-zone heating systems using a heat hub with room thermostats and smart radiator thermostats Wiser covers single-zone and multi-zone arrangements with different combinations of hub, room thermostats, and radiator thermostats, and behaviour depends on how the system was configured rather than only on what is installed. The Drayton Wiser documentation for your arrangement is the reference. Owner-safe checks: Confirm whether the rest of the house heats normally during the same period, which separates a room fault from a system fault. | Check and replace the batteries in the affected radiator thermostat, since a device without power cannot move a valve. | Listen at the radiator when a demand is set, since a valve that is being driven makes an audible movement. Qualified technician: A radiator that stays cold with its valve confirmed open, or that is cold at the bottom while hot at the top, is a hydraulic matter for a heating engineer. | Removing a radiator thermostat from a valve body, or changing a valve, risks releasing water from a sealed system and sits outside owner maintenance.