wondering if this is the issue as well, just replace the thermistor and nozzle with https://www.amazon.com/Creality-Official-Sprite-Extruder-Upgrade/dp/B0BMVKGX86?th=1 and still not heating and now neither fan will sping up when asked to :(

Creality Official Sprite Extruder... https://www.amazon.com/dp/B0BMVKGX86?ref=ppx_pop_mob_ap_share

That’s what I picked up when I did exactly the same thing as you :)