Loxone troubleshooting: 7 common problems and how to fix them

Updated: June 3, 2026 · 8 min read

TL;DR

  • Miniserver not responding: check power → ethernet cable → restart from the app.
  • App offline: verify Cloud DNS and that username/password are correct.
  • Lights or moods failing: check Tree extensions and physical connections.
  • Push notifications not arriving: check phone permissions and that the user is registered on the Miniserver.
  • SD full: delete logs from the Miniserver web interface.

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The 7 most frequent Loxone problems

1

Miniserver not responding (red or no LED)

  1. 1. Check that the front LED is on. If it is off, inspect the power cable and the circuit breaker.
  2. 2. If the LED is red, check the ethernet cable between the Miniserver and router. Connect it directly to the router, not to a secondary switch.
  3. 3. From the Loxone app, tap the Miniserver name → Restart Miniserver. Wait 90 seconds.
  4. 4. If it still does not respond, physically disconnect power for 30 seconds and reconnect.
2

App cannot connect to the system

  1. 1. Open the app and check the status icon in the top corner. An orange cloud indicates a network problem.
  2. 2. Verify that Loxone Cloud DNS is active: go to app.loxone.com in a browser and confirm you can see your Miniserver.
  3. 3. Check username and password. Loxone app credentials are different from your my.loxone.com account — they are the Miniserver's own credentials.
  4. 4. If you recently changed your router or Wi-Fi password, the Miniserver may still be trying to connect to the old network. Connect it via ethernet temporarily to re-establish the connection.
3

A light or mood does not work

  1. 1. Try activating the light individually from the app. If it responds individually but not via the mood, the issue is with the mood configuration — edit it (see the moods guide).
  2. 2. If the light does not respond at all, check the status of the corresponding Tree extension. In the app go to Miniserver → System Status.
  3. 3. Physically inspect the actuator (dimmer or relay). An orange LED on the actuator indicates a communication failure with the bus.
  4. 4. If multiple lights in the same zone fail, the Lighting Controller for that zone may have lost its Tree bus connection.

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4

Thermostat is not heating or cooling

  1. 1. In the app, open the climate control for the room and verify the active mode: Comfort, Eco, or Manual.
  2. 2. If it is in Eco mode, the target temperature is higher (heating) or lower (cooling) than normal. Switch to Comfort temporarily to confirm the equipment responds.
  3. 3. Verify that the room sensor temperature reading is accurate. A miscalibrated sensor can make the system think the target temperature has already been reached.
  4. 4. Check that the AC/heating unit has power and that the Loxone thermostat is sending a signal (thermostat actuator LED).
5

Push notifications not arriving

  1. 1. On your phone: Settings → Notifications → Loxone → confirm they are enabled.
  2. 2. In the Loxone app: Profile → Push Notifications → make sure this device is registered.
  3. 3. Sign out of the app and sign back in. This re-registers the device push token.
  4. 4. Verify that the Miniserver has an active internet connection — without internet, the Loxone notification server cannot reach your phone.
6

SD card / storage full on the Miniserver

  1. 1. Access the Miniserver web interface: open a browser and go to its local IP (e.g. 192.168.1.50) or via Cloud DNS.
  2. 2. Go to Diagnostics → Logs. You will see storage used and can delete old logs.
  3. 3. Delete events older than 90 days. Do not delete the configuration file or recent backups.
  4. 4. If the SD card is more than 4 years old, consider replacing it preventively. Class 10, 16 GB SD cards are sufficient for most installations.
7

My installer disappeared and I have no support

It is more common than you would think. Installers change business, close, or simply stop responding. Meanwhile your system keeps running — but with no one who understands it.

  1. 1. Recover admin access to the Miniserver: you need the original admin username and password. If you do not have them, a factory reset wipes the programming — not recommended.
  2. 2. Export the configuration backup from the web interface (Diagnostics → Backup) before making any changes.
  3. 3. Document the current state: number of extensions, firmware version, Miniserver name.
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Frequently asked questions about Loxone troubleshooting

How do I know if my Miniserver is on or off?

The front LED indicates status. Solid green: running. Red: there is an error. No light: no power. In the app, an orange triangle or cloud with a warning means no connection to the Miniserver.

What is Loxone Cloud DNS and what is it used for?

Loxone Cloud DNS is the Loxone service that assigns your Miniserver a unique domain name (dns.loxonecloud.com/YOUR-SERIAL). The app uses it to connect to your home from any network without needing a static IP or VPN.

How often should I back up my Miniserver?

Loxone recommends backing up every time you make significant programming changes. With LoxPilot, the backup is verified automatically and you receive an alert if it has been more than 7 days without a backup.

What happens if my Miniserver SD card is full?

A full disk can cause the Miniserver to stop logging events, fail backups, or behave erratically. The most common symptom is an orange LED or log errors. It is recommended to delete old logs or replace the SD every 3-4 years.

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