Nozzle not heating up  

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mrdavis47
(@mrdavis47)
New Member

Hi!

 So, I was changing the nozzle on my MK3S as I've done tons of times, but accidentally touched a wire (I'm assuming) with my pliers. There was a spark, and now my nozzle won't properly heat. (Preheat Error).  I checked the fuses and they seem to be intact.  So now what should I do or what part should I order?  

 Did I mess up the thermistor wires, or the other wires going into(?) the heater blocker, that are covered in a red sleeve?  Please help.  I tried emailing Prusa support, but no response. Thanks!

 

Posted : 26/11/2019 6:10 pm
bobstro
(@bobstro)
Illustrious Member

Contact support via online chat when logged into the e-store. I'm thinking the thermistor, but it could be either. I'd recommend keeping a spare of each on hand for this exact reason.

Also... unless you've been fastidious with keeping your nozzle and heater block clean, replacing either the thermistor or heater cartridge may be difficult if they're really gunked up. I had to replace my heatbreak, heat block, heater cartridge and thermistor recently. If you end up doing that, it's a good opportunity to upgrade the heatbreak and apply thermal paste to reduce possible temperature issues.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 26/11/2019 6:46 pm
Karl Herbert
(@karl-herbert)
Famed Member

"There was a spark, and now my nozzle won't properly heat. (Preheat Error)."

I got the same error after cleaning the nozzle with a brass  brush. Changing the thermistor solved the problem. By this opportunity i also changed the heater block, heater cartridge and nozzle.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 27/11/2019 8:35 pm
bobstro
(@bobstro)
Illustrious Member
Posted by: @karl-herbert

"There was a spark, and now my nozzle won't properly heat. (Preheat Error)."

I got the same error after cleaning the nozzle with a brass  brush. Changing the thermistor solved the problem. By this opportunity i also changed the heater block, heater cartridge and nozzle.

FYI - After experiencing the spark but without the dead components, I have started using cardboard strips to clean the nozzle and hotend. I get a bit more control, and a side-to-side "toothbrush" action gets bits off that were difficult with the brush. The cardboard is also easier on nozzle and heater block non-stick coatings. A wooden toothpick is useful for cleaning up around delicate parts.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 27/11/2019 8:42 pm
Karl Herbert
(@karl-herbert)
Famed Member

@bobstro

Thank you for the Tip!

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 27/11/2019 9:29 pm
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