- HVAC
- Smart thermostats
IMPOSIBLE-ALCANZAR-TEMPERATURA
Netatmo Valve IMPOSIBLE-ALCANZAR-TEMPERATURA: Eco priority
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
The ‘Impossible to reach schedule temperature’ alert in the Netatmo Energy or Home + Control app means a Smart Radiator Valve is requesting heat while the Smart Thermostat is satisfied under Eco priority; switch Operating mode to Comfort priority or trigger a Manual Boost on the Thermostat.
Safety first
Stop and check this first
- Keep in mind that switching from Eco priority to Comfort priority allows any Smart Radiator Valve to fire the boiler above the Thermostat's setpoint, which will also heat any radiators not fitted with Smart Radiator Valves.
- Do not dismantle your Smart Radiator Valve or adjust boiler wiring because of the ‘Impossible to reach schedule temperature’ message: it is a schedule priority notification rather than a hardware fault.
Safe checks you can perform
- Compare the Smart Thermostat room temperature and setpoint against the Valve room in the app
- Check whether Eco priority or Comfort priority is selected under Operating mode
- Switch Operating mode to Comfort priority or start a temporary Manual Boost on the Thermostat
Leave these tasks to a qualified professional
- Do not attempt this professional task: Have a heating engineer balance radiator lockshields or review Smart Thermostat placement
- Do not attempt this professional task: Contact Netatmo support if the alert still appears while Comfort priority is active
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Have a heating engineer balance radiator lockshields or review Smart Thermostat placement
What they doA heating engineer balances the radiator lockshield valves or advises on relocating the Smart Thermostat if its room warms up much faster than the rest of the home.
They must show youtemperature readings across the Thermostat room and Valve rooms during a heating cycle after balancing the radiator lockshield valves.
In writingthe written heating balancing report and the recommended Operating mode priority setting for your layout.
Contact Netatmo support if the alert still appears while Comfort priority is active
What they doNetatmo support checks the association between your Smart Thermostat and Smart Radiator Valves if the alert persists under Comfort priority.
They must show youa screenshot of the Operating mode screen set to Comfort priority along with the room temperature graph curves in the app.
In writingthe Netatmo Help Center request number and the diagnostic findings on your Thermostat and Smart Radiator Valve association.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Compare the Smart Thermostat room temperature and setpoint against the Valve room in the app
- Who:
- you, checking the main screen of the Netatmo Energy or Home + Control app.
- How:
- open the app and compare the current measured and target temperatures in the room with the Smart Thermostat against the room with the Smart Radiator Valve showing ‘Impossible to reach schedule temperature’.
- Result that matters:
- confirm that the Smart Thermostat room has already reached its target temperature and turned the boiler off.
- If the Smart Thermostat room is already warm enough while the Valve room asks for heat:
- check Operating mode in step 2.
- If the Smart Thermostat is also calling for heat but no radiators warm up:
- check the Relay connection and boiler.
- Evidence to keep:
- screenshot showing both room temperatures and setpoints in the app.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Check whether Eco priority or Comfort priority is selected under Operating mode
- Who:
- you, in the Netatmo Energy or Home + Control app settings.
- How:
- open the app settings and go to Operating mode to verify whether the Eco priority or Comfort priority algorithm is currently active for your Smart Radiator Valves.
- Result that matters:
- verify whether Eco priority is preventing the Smart Radiator Valve from turning on the boiler independently.
- If Eco priority is selected:
- this explains the alert and you can choose how to adjust it in step 3.
- If Comfort priority is already selected yet the alert appears without calling for heat:
- save a screenshot for Netatmo support.
- Evidence to keep:
- screenshot of the Operating mode settings screen in the app.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Switch Operating mode to Comfort priority or start a temporary Manual Boost on the Thermostat
- Who:
- you, updating the priority setting or schedule in the Netatmo app.
- How:
- if you want the Smart Radiator Valve to turn on the boiler whenever its room is below schedule, change Operating mode from Eco priority to Comfort priority; to keep Eco savings, start a temporary Manual Boost on the Smart Thermostat or align the room schedules.
- Result that matters:
- allow hot water from the boiler to circulate to the cooler Smart Radiator Valve room.
- If the ‘Impossible to reach schedule temperature’ alert clears and the Valve room warms up:
- normal operation confirmed.
- If the radiator stays cold even in Comfort priority when the Valve requests heat:
- check Valve calibration or call a heating engineer.
- Evidence to keep:
- screenshot of the updated Operating mode setting and the room temperature graph curve.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- HVAC
- Brand
- Netatmo
- Product type
- Smart thermostats
Known code variants
- Alerta Imposible alcanzar la temperatura del programa Netatmo
- Imposible alcanzar la temperatura del programa
- Impossible to reach schedule temperature
- La aplicación Energía o Home + Control indica Imposible alcanzar la temperatura del programa
- Netatmo alert Impossible to reach schedule temperature
- The Energy or Home + Control app indicates Impossible to reach schedule temperature
What it means
According to Netatmo's official Help Center article for installations combining Smart Radiator Valves with a Netatmo Smart Thermostat (systems using standalone valves or other thermostats behave differently), the Energy or Home + Control app shows ‘Impossible to reach schedule temperature’ when Eco priority is active. Under Eco priority, Smart Radiator Valves cannot turn on the boiler beyond the Smart Thermostat's setpoint. Seeing this alert alone never proves that your Valve, Thermostat, or boiler is faulty: it is the normal energy-saving rule of Eco priority.
Warnings and stop conditions
- Loweditorial warning
Keep in mind that switching from Eco priority to Comfort priority allows any Smart Radiator Valve to fire the boiler above the Thermostat's setpoint, which will also heat any radiators not fitted with Smart Radiator Valves.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
- Loweditorial warning
Do not dismantle your Smart Radiator Valve or adjust boiler wiring because of the ‘Impossible to reach schedule temperature’ message: it is a schedule priority notification rather than a hardware fault.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Symptoms and causes
Probable causes · in order
- Eco priority active while a Valve room requests a higher temperature than the ThermostatCommon
When Eco priority is selected, Smart Radiator Valves restrict heating and can only warm their room during periods when the Smart Thermostat itself calls for boiler heat.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
- Thermostat room already at setpoint while the Smart Radiator Valve room is coolerCommon
If the room containing the Netatmo Smart Thermostat reaches its target temperature first and shuts off the boiler, rooms with Smart Radiator Valves cannot heat further until the Thermostat calls for heat again.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
- Mismatched weekly schedule times between the Thermostat room and Valve roomsPossible
Setting a weekly schedule where a Valve room asks for comfort heat at an hour when the Smart Thermostat room is scheduled for a lower setback temperature triggers this alert in Eco priority.
Evidence: The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Virtual technician
Does IMPOSIBLE-ALCANZAR-TEMPERATURA still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
The Energy or Home + Control app indicates 'Impossible to reach schedule temperature', why?
Netatmo · 2026 · official_doc
- 2
Netatmo · 2026 · official_doc
Was this entry useful?