If your home radiators will not switch off even when the central heating isn’t on, the most likely cause of the issue is troubles with a diverter or check valve.
Should the valves become damaged or blocked, they can continue to transport hot water to your radiators even when the thermostat is switched off. Lukewarm water taps are another sign that your radiators might be working overtime.
For a more detailed insight and tips on how to rectify the problem, explore our dedicated blog, Why are my radiators getting hot when the heating is off?