That ^ when I replaced the roomstat in our last place for a wireless one the wiring turned out to be a phone line, so the draw must be minimal to say the least.
That's fairly dodgy as if it is a mains control loop it will probably have a 3A fuse which is almost certainly plenty to set phone wire on fire. Quite tempted to try.
That ^ when I replaced the roomstat in our last place for a wireless one the wiring turned out to be a phone line, so the draw must be minimal to say the least.