Why Does My Boiler Keep Losing Pressure? | Vaillant Boiler Expansion Vessel Fix

Does your boiler keep losing pressure every couple of days? You’re not alone — this is one of the most common boiler faults we deal with at DHS. In this short guide, Adam from Dynamic Heating Services explains how to spot the signs of a faulty expansion vessel in a Vaillant boiler, why it causes pressure loss, and what needs to be done to fix it. Simple engineer’s check to diagnose the problem What the expansion vessel does Signs it needs replacing Why the pressure relief valve should also be changed If your boiler keeps losing pressure, don’t ignore it — get it checked before it causes further damage. 📍 Serving Bristol, Bath & North Somerset 📞 Call: 0117 924 7200 🌐 Visit: https://www.dhs-uk.com DHS is a Which? Trusted Trader with 40+ years of experience in heating and plumbing. #BoilerPressure #VaillantBoiler #CentralHeating