How to change Vaillant Ecotec diverter valve(3 way valve) step by step

In this video, I replace the diverter valve on a Vaillant EcoTEC Plus boiler. This is a common fault when: • Hot water works but radiators don’t • Heating works but hot water doesn’t • leaky diverter valve is quite common 🔧 steps • Isolating the boiler and heating valves • Draining of primary system is required • Removing the old diverter valve • Fitting the new diverter valve • Reassembly and final check ⚠️ Important: This video is for educational purposes only. Gas appliances should only be worked on by a Gas Safe registered engineer. If you find this useful, like, comment, and subscribe for more real boiler repairs and plumbing videos.