Here is the beginning of the story about the first breakdown of my P1S. Overall, it's simple. Either the nozzle got clogged, or the thermistor broke (there was a broken wire, but you can't guess whether I pulled it off or it was actually damaged).

In short, the thermistor arrived. I installed it instead of the old one. Already knowing what to do - it took literally up to 10 minutes. Most of the time was spent cleaning my hands from thermal paste. I installed it and... a new error. Its description deserves a separate post. Spoiler - everything will work.