Ender 3 heat block replacement July 8, 2019 16 32 64 128 Ender 3 s1 heat block replacement Ender 3 v2 heat block replacement Ender 3 v2 neo heat block replacement Ender 3 s1 pro heat block replacement Ender 3 thermistor fix Ender 7 hotend upgrade Ender 3 pro magnetic bed replacement Replace fan ender 3