The answer to 'my boiler keeps shutting off' is that there are several common causes, including a faulty thermostat, low water pressure, or a problem with the boiler itself. The boiler may be shutting off due to safety mechanisms kicking in to prevent damage.
Some common symptoms include the boiler turning on and off frequently, the house not heating properly, or the boiler making strange noises. Solutions can range from adjusting the thermostat settings to repairing or replacing parts like the pressure valve or ignition system. In many cases, it's best to call a professional HVAC technician to diagnose and fix the issue, as boiler repairs can be complex and dangerous for DIY work.