Most boiler noises have an everyday cause, like air in the system or low pressure. A few mean it should be looked at straight away. Here's what each one usually means.
If the gauge is past 2.5 bar with the heating on, or above 2 with it cold, there's too much water in the system or something is letting it build up. Here's why, and how to bring it down.
If you're topping up more than once a month, water is getting out somewhere. Here are the usual causes, what you can check yourself, and when it's a job for us.
Between 1 and 1.5 bar on the gauge when the heating is cold, rising to about 2 bar when it's running. Here's how to read it, and what to do if it's too low or too high.
If your boiler has broken down again, you're probably wondering whether to fix it one more time or replace it. It comes down to its age, how often it goes wrong, and what the repair costs.