If they didn't help, please have a look at the pinned posts in the individual sub-forums. There you will find further important and helpful information.
Below is a list of common causes of problems with Shelly products.
The list is continuously updated, but does not claim to be complete.
The alarm is not transmitted or is not displayed in the log
|Actuator||problem / error pattern||Remedy|
|all Shelly||Shelly cannot be integrated into WLAN or app, does not provide any data via MQTT||Router incompatible?
Shelly and (partially) incompatible network components
Problems with integration into the SHELLY CLOUD app
Tips for beginners B2 (for WiFi)
Shelly doesn't like hidden SSID or special characters in it.
|Shelly cannot be found in the app despite a positive message in the room||possibly the Shelly is in HIDDEN DEVICE, check and correct the assignment there via "Edit" (pen)|
|Shelly is switched on, pops and the fuse falls, smell of burning (this may also only happen a few days after commissioning)||Switching voltage on the SW is on a different phase than the supply voltage, thus 400V on the Shelly -> check and correct connection|
|Problems with the glow lamp in the switch or button||Find the solution here (German thread)|
|Error message: Bad default state, botton type combination||Adjust Power on default mode|
|Shelly should switch itself (via Actions)||To do this, the IP address in the http request must be replaced by "localhost" (without quotation marks).|
|all with relay contact||Consumers stay on even though Shelly is switched off||The cause are mostly sticky relay contacts. This problem arises from very high inrush currents.|
Remedy: Install inrush current limiter.
|230V Shelly (without lamp)||Shortly after commissioning, there is a bang when switching on, at least 1 fuse drops, as well as the FI, if present||In almost 100% of the cases it is a connection error! This error pattern occurs when a different phase is switched for the software than is used for the voltage supply at "L". This means that 400V are applied to the Shelly at the moment of switching.|
|Shelly with switch with control light it does not work||The solution can be found in this (German) article|
|battery-powered Shelly||Device keeps going offline||This is not a mistake. |
To save the battery, all battery-operated Shelly go into sleep mode. Lexicon entry for this.
|Your batteries only last a very short time and are then empty||CR123 - Übersicht|
serves for orientation based on the experience of other users.
|Shelly App||Cloud problems or access problems in the WLAN|
|A very good alternative is the ShellyPilot app , which is currently only available for Android.|
|Shelly1||You want to make your garage door control smart||Shelly1 is the first choice and there are already numerous contributions in the sub-forum.|
The appropriate circuit diagram can be found in the lexicon
|Shelly 2.5||The calibration of the roller shutter actuator causes problems||Pay attention to the minimum load and the topic of isolating relays, more in the contributions of the sub-forum|
|switches off due to excess temperature!||Unfortunately a common problem that actually only occurs in relay mode, especially with poor or no ventilation / tight installation or excessive continuous load. The factory specification is clearly not achieved.|
|Shelly 3EM||Measured values not plausible||see this (German) thread|
|Shelly Button1||Settings are not saved||Set Remain Awake (battery) to 5, |
make settings in USB mode
|Shelly Dimmer||Switching on and off works, not dimming||Connection error: L and O reversed -> check and correct connection|
|"Ghost" circuits||Power On Default mode from "On" to "Off"|
|Shelly Dimmer2||Error 1||No change in the operating voltage when operating without N possibly check minimum load|
|Error 2||Calibration failed, as there was no change in performance during calibration recalibrate|
|Error 4||Supply voltage problem|
|Opening and closing is not reliably detected||Check alignment, magnet and sensor don't have to sit as close together as many assume. (There are some pictures for working montages in the threads of the sub-forum)|
|Device keeps going offline||This is not a mistake. To save the battery, all battery-operated Shelly go into sleep mode.|
|unexpected flashing, no AP after reset||Check / replace batteries|
|Shelly Flood||The alarm is not transmitted or is not displayed in the log||Usually when testing the flood is "drained" too quickly. In order for the alarm to appear in the log, the flood must have an alarm until the end of the transmission, i.e. it must be in the water|
|Shelly H&T||Device keeps going offline (WLAN)||This is not a mistake. To save the battery, all battery-operated Shelly go into sleep mode.|
|Shelly Motion||Device keeps going offline (WLAN)||This is not a mistake. The Motion also goes into a partial sleep mode.|
|Shelly TempAddon||No display of the values||usually a wiring problem -> check and if necessary use better terminals or solder|
Firmware up-to-date? The add-on was not yet available on very old firmware, so it is not recognized!
|does not appear to be recognized||Reboot Shelly with the addon|
The add-on may only be plugged in or unplugged when the Shelly is de-energized,
|Unexpected / no display or function||Attention:
Only plug in or unplug the Temp add-on when the Shelly is de-energized!