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🔧 how to replace an auto air vent (AAV) on a Worcester Bosch 30si / 25si / 24 junior / 28 junior 🔧
Customer had a boiler service and the engineer spotted a new AAV was required but ddnt have one on the van so wanted to charge for a second visit to supply and fit one and the customer lost faith so I was called in…
Here’s a quick step by step how to replace one even when the manufacturers preferred method fails…