I feel an achievement having lasted longer than you
The builders tried to connect our fancy thermostat back up today. Doesn't work. No idea why. So further delays to having any heating. The thing costs about £200 (we got as part of new boiler) as well as being smart/WIFI , tells you the outside temp on the screen too (either via a sensor that you can stick on your house, or using local data, we went for the local data which is quite accurate wherever it comes from , the sensor needed wiring in and would have been on the patio in sunshine) to help work out how hard to heat your home. But to break after 2 years is rather annoying. Should have gone for a simple old school thing!
Hah! It's already gone off (didn't take long to raise half a degree), but I suspect it'll be on again overnight - it's the first day in months that indoor temperatures have fallen during the day, even with a little sunshine.
As for the smart thermostats - I had a nose around when mine was being installed last year (there's a law that says with a new boiler you have to have one of a few options, I went for the thermostat option). There were a surprising number of cables needing to be hooked up and the boiler company ended up subcontracting it out to an electrician (who wanted to run a fused spur, but eventually put a "plug top" on it instead).
It's unlucky that yours should have broken, all I can think of is that maybe it's not been wired in correctly? Most boilers have a manual override, but it's not ideal...