Sonoff TH10 -suddenly stopped working - no lights, no power.
Probably failled when it was supposed to turn on a heater.
What should I check ?
Check voltage on input to the TH-10. If you have voltage check the fuse inside the TH-10. If the fuse is good throw the TH-10 in the trash. If you don't have input voltage check breaker/fuses/wiring leading to the TH-10.