I've had a new boiler fitted, a Bosch-Worcester one, in a medium size house. It's been serviced professionally, when required. The new boiler came with a thermostat control pad. All the copper piping for radiators was left as is. It's at least 20 years since these copper pipes were changed.
There is a person in my house, let's call her "the wife", who sets the pad at a high temperature then puts it in a room or area with no heating. This results in the constant burning of gas for hours on end (I'm out at work so don't know for how long exactly, "several to half dozen+ hours" is the best guess). Radiators are so hot, they cannot be touched for longer than a second or two. This is a several times a week occurrence and will be perpetrated until Spring.
Other than higher gas bills, what are the short and long term adverse effects on the central heating?