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Hi, I have two indirect water cylinders (Gledhill) connected to a gas boiler (Vaillant). The system is setup/programmed so that the tanks heat up twice a day for about 2 hours. When the tanks start to heat, one of them makes a loud vibrating noise, sometimes for about 15-20 mins, sometimes for...

Hi, I'm trying to identify what is causing these marks on my skirting board (see picture below) and would appreciate any advice! -- The skirting boards were changed about 6 months ago. There were no marks on the skirting board then. I don't know if the door frame on the left was buckling. --...