Hi, this is Worcester, Bosch Group
We have a boiler repressurisation section on our website within the frequently asked questions. The link is: http://www.worcester-bosch.co.uk/homeowner/products/faqs/boiler-repressurisation
If you require further help our technical support team are available 6 days a week on 0844 892 3366.
Worcester, Bosch Group, August 2010