Boiler on off issues? Common causes and when to call a pro

When your boiler on off, a heating system that cycles power to maintain home temperature. Also known as gas boiler, it’s meant to run quietly and reliably—until it starts turning itself off or refuses to turn on at all. This isn’t just an inconvenience; it’s a sign something’s wrong inside the system. Most people assume it’s a power issue, but the real causes are often simpler—or more serious—than you think.

A boiler, a device that heats water for central heating and hot water supply that keeps switching off could be low on pressure, blocked by sludge, or has a faulty thermostat. If it won’t turn on at all, check your fuse box first—many times, it’s just a tripped circuit. But if the power’s fine and the display is blank, the control board might be dead. Or worse, the ignition system could be faulty. A gas boiler, a heating system that burns natural gas to produce heat isn’t something you can safely fix without the right certification. In the UK, only Gas Safe registered engineers can legally work on gas lines. Trying to open it yourself could leak gas or void your warranty.

You’ll find posts below that dig into the exact symptoms you’re seeing: boilers that turn off after a few minutes, ones that click but don’t ignite, or systems that show error codes you don’t understand. We’ve covered what to check before calling a pro, how to reset common models, and when it’s cheaper to replace than repair. If your boiler is over 10 years old and you’re fixing it for the third time this winter, it’s probably time to think about replacement. But if it’s newer and just acting up, a simple sensor swap or pressure reset might bring it back to life. Don’t guess—check the facts.