Recently I had a new electric towel rail fitted to a bathroom by an electrician. I got him to install a Shelly 1PM Plus at the same time. The Shelly is basically acting a smart isolating switch.
I don’t really use the Shelly much, it’s usually left on, and the heater is manually controlled using its own simple on/off/2hr boost panel. However I wanted the Shelly for the occasional times when wanted a timer or remote control, so that I could control it on cold winter mornings when I get up at 5am.
It’s been fine for the last few months. But it’s just suddenly started giving a ‘over voltage warning’ notification. The heater is not in use, hadn’t been used for weeks, so isn’t drawing any power.
What could be issue be? Is it faulty? Anything I can check in the app? Do I need to get the electrician in urgently?