Your hot water system needs to maintain a certain pressure level to ensure it delivers its contents efficiently to where they need to be. If pressure decreases or increases beyond the ideal level, this can mean no hot water in your home.
You will be able to identify if boiler pressure is the culprit of your hot water malady by checking your boiler’s gauges. These are usually set at 1-bar. If the needles have dropped or increased, this indicates a problem with your boiler or heating system. Read more on this article: