One day, my shower suddenly wouldn't get warm. I had no idea why! But I wanted my shower, so I just went for a cold one.
I'd like to have the choice in how warm my showers are, so I had a look at the boiler. I didn't see anything wrong with it! I pressed the "reset" button just in case. Maybe it would help.
By the time my next shower was due, I had checked that the heating worked, so the boiler itself was working. I switched on the hot water, ran up the stairs, checked the boiler had fired up, and ran downstairs again for my shower. Which stayed cold. This was confusing!
My first hypothesis had been: the boiler wasn't working, but that was clearly not the case. My second hypothesis was: the boiler was working, but only for the heating. Not sure how that makes sense but it is worth considering. But that seemed disproven too now. Why would it fire up if I switched the hot water on then? So now I have third hypothesis: something else is wrong. I know it's not very specific. Googling, and looking up the users manual, hasn't helped very much yet. I suppose it's not urgent; it's May, so cold showers are not much of a problem. But sooner or later I will have to solve this. One day autumn will return and then I will want to have hot showers again! And I might want to wash my hair before that time, and I don't want to do that with cold water. I will give it a few more days to see if I can solve this myself. the previous time I had boiler issues, I did manage to sort it in the end, so I'm not giving up yet. I hope I won't have to call the plumber in!