Category Archives for "Vaillant Boilers"

Vaillant Boiler Pressure Going Too High

I had a job to do today on an older Vaillant Ecotec combi boiler. The system pressure kept going really high when the heating was on. But when the heating cooled down, the pressure went really low and caused an F22 fault. What Causes Boiler Pressure To Go Really High This is a common fault […]

Vaillant Ecotec F28 Fault Code (Cause and Solution)

F28 Error Code On Vaillant Ecotec Combi Boiler Today, I had what seemed like a pretty standard callout to a Vaillant Ecotec Plus 831 combi boiler in Greenhithe. It was showing an F28 fault code. This code means that the boiler tried to light unsuccessfully 3 times in a row. It does this as a […]