I'm not sure if the tech has moved on that much, feel free to correct me if you are itk.
I have this conversation with the bloke from Harwood every year, there's 3 major components apparently and 2 of mine have broke and been replaced easily enough.
Last year I got a Hive hooked up to it so I can control from my phone. Cost about Β£130, means I've got more control over when it's actually on.