Signs such as low pressure, operation noise, frequent breakdowns, yellow flame, unusual odour, and higher energy bills indicate that you need a new boiler. When you start seeing these signs, call a certified gas engineer to inspect the boiler and its parts.
There are some tell-tale signs which indicate the boiler is not running smoothly. If the problem is serious, this could mean you need a new boiler. These are the 11 signs that indicate you might have to get a new boiler: