Hello, please can someone help. I need some guidance on how to fix our mixer tap in the kitchen. It now has no hot water and from reading other posts I think its a washer or furry pipes. I have a combi boiler so from what i've read I can rule out air bubble. My problem is I don't know where to start on changing the washer. Please can someone give me some guidance. Below are some pictures of the tap in question. View media item 25431 View media item 25432