Once you’ve topped up the pressure, you’ll need to reset the boiler on the baxi pf you’ll see an orange button on the pf there will be a red button these buttons will reset the boiler and get it up and running again. Great customer service! very trustworthy people!! When you call us to report your blockage, we'll always try to let you know when we'll be able to get to you and, if it changes, we’ll try to keep you informed. Osby parca.