Wiser Radiator Thermostat (smart TRV) shows TRV01 in app; valve not responding to temperature changes.

Safety: Radiator thermostats are battery powered and low voltage. Take care when removing from the valve body; hot water may be present in the radiator.

• Check batteries: Replace TRV batteries with new alkaline cells and retry operation.
• Free valve pin: Remove the TRV head from the radiator valve. Gently press the metal pin on the valve body in and out with your thumb or pliers until it moves freely.
• Recalibrate TRV: Refit the TRV head and, in the app, trigger a calibration or fully open/close cycle if available.

If TRV01 persists and the motor does not move even with good batteries and a free valve pin, the TRV head is faulty and should be replaced.