Plumbing

CH pressure drops and not sure what to do next

Anonymous user 01/03/2024 - 2.55 PM

Hi all, I'm in a tight spot and would really appreciate help - I live in a new-ish (2009) flat. Hot water and central heating is provided by a recently fitted Worcester Greenstar combi boiler. Unfortunately, I've been having pressure drops both with the current boiler and the previous boiler over the span of a week. I'll refill the boiler to about 1 - 1.5bar, and it'll eventually drop to below .5bar, which will cause it to shut down. The central heating is a multi-zone underfloor system - no radiators at all in the property, so I can't visually confirm there's any leaks. Leak detection companies have told me that "the leak is so slow we wouldn't be able to find it" and to just keep an eye on it. I often check with my neighbours directly below and they haven't had any ingress that they can tell. My plumbers have confirmed the boiler is in good working order. This has been an issue for a long time now - and is especially bad during winter when I'll eventually wake up to a very cold flat that takes many hours to heat up after refilling the loop - let alone being able to rely on frost protection when away. What can I do next? I'm at my wits end!