Is your boiler or freezer still on – remotely monitor them

The author’s gas-fired central heating boiler is about five years old and the service engineer says there’s nothing wrong with it. However, it has one annoying habit – every so often it “locks out” for no apparent reason. A red light-emitting diode (l.e.d.) on the front panel flashes and there is no more hot water until the Reset button has been pressed.