Thermistor cannot be removed  

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urhoebeling
(@urhoebeling)
Active Member

Hey all,

I'm trying to remove my hotend - it needs thorough cleaning due to filament leaking issues - and am running into a lot of trouble with the thermistor. The Prusa disassembly guides say to simply loosen the grubscrew and gently push the thermistor out with an allen key, and that definitely isn't working for me.

 

I've removed the grub screw, and tried all forces between "gently pushing" and "as hard as I can" to get the thermistor to budge - no dice. Even tried some light taps from a hammer with a punch - again, no luck.

 

 

Any other ideas on what I can try?

Posted : 18/09/2020 11:26 pm
urhoebeling
(@urhoebeling)
Active Member

Gave heat a shot and it seems to have worked out. Used a mini torch to get the block up to around 170C and the thermistor was much more amenable to leaving its hole.

Posted : 18/09/2020 11:52 pm
charles.h13
(@charles-h13)
Famed Member

I heat mine up with a hot air head gun line the one in the link.  It will loosen the debris in the hold with the grub screw.  

Posted : 18/09/2020 11:54 pm
Karl Herbert
(@karl-herbert)
Famed Member
Posted by: @urhoebeling

Hey all,

I'm trying to remove my hotend - it needs thorough cleaning due to filament leaking issues - and am running into a lot of trouble with the thermistor. The Prusa disassembly guides say to simply loosen the grubscrew and gently push the thermistor out with an allen key, and that definitely isn't working for me.

 

I've removed the grub screw, and tried all forces between "gently pushing" and "as hard as I can" to get the thermistor to budge - no dice. Even tried some light taps from a hammer with a punch - again, no luck.

 

 

Any other ideas on what I can try?

To remove the thermistor and the heating cartridge I always set the temperature to maximum (290 degrees C.) If it does not work then, I would remove the hotend and try with the heat gun. Before installing the components I would coat them and also the screws with ceramic or copper paste - as well as the nozzle.

good luck!

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 : 24/09/2020 8:06 am
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