Started out with hot tap water not getting hot due to a pressure gauge issue. Followed the manual/YouTube instructions to repressurise as best I could (turn boiler to "off" position, open valves until pressure gauge reads 1-1.5 bars, close valves, turn boiler back on). Seemed straightforward enough, but now not only is the water still not getting hot, there's no water whatsoever coming out of the tap.
What have I done, MN?! I'm completely fucked and going to need to get in an engineer, aren't I? Please say no...