Thermostat cannot control paired Meross smart radiator valves (TRVs); valves do not open or close as expected.

Safety: No mains work; TRVs are typically low-voltage/battery devices.

Steps:

• Check TRV status: In the Meross app, verify that each TRV is online and shows normal battery level.
• Re-bind TRVs: Remove TRVs from the thermostat's zone, reset them, and add them again following Meross instructions.
• Improve signal: Reduce distance and obstacles between thermostat and TRVs, or reposition the thermostat for better coverage.
• Test direct control: Try controlling TRVs directly from the app to confirm they respond independently of the thermostat.

Outcome: If TRVs work from the app but not via thermostat schedules, the thermostat's zone control logic may be faulty; firmware update or replacement may be needed.