Vaillant Part No: 0020254533 | NOW USE 0010028086 PRINTED CIRCUIT BOARD | 24 Hour Delivery | Heating Spare Parts
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VAILLANT ECOTEC PRO 24/28 (2012 Model) Circuit Board PCB 0020108264 0020219276 : Amazon.co.uk: DIY & Tools
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NEW Vaillant Eco Fit Pure 825 830 & 835 COMBI Boiler PCB Board 0020273087 | in Southgate, London | Gumtree
![Can anybody tell me what those blue areas on the small attached board on the main pcb are? The board is from a water heater pcb. : r/AskElectronics Can anybody tell me what those blue areas on the small attached board on the main pcb are? The board is from a water heater pcb. : r/AskElectronics](https://i.redd.it/can-anybody-tell-me-what-those-blue-areas-on-the-small-v0-1eu9gkm67bd81.jpg?width=1200&format=pjpg&auto=webp&s=2193f804e4eddcdd14492adbdfbd7114bf583707)