Before attempting a fix, confirm the following signs which typically point to an airlock rather than a mechanical boiler failure:
garden hose or washing machine hose, or a short length of pipe with connectors. air lock in hot water tank
If you’re not confident with any of these steps, call a local plumber. An air lock is usually harmless, but forcing the wrong fix can damage pipes or the hot water system. Before attempting a fix, confirm the following signs
Hold for 30–60 seconds, then turn off the cold tap and check the hot flow. Method 2: The Hosepipe Method Before attempting a fix