Nozzle temperature going crazy
Hello!
I had a print going earlier today and I got a thermal runaway error. I cleaned up the failed print/nozzle/etc and ran a self test. Everything came back successful. I restarted the print and about 25-30 min I heard the fans start turning on and off. I cancelled the print, waited for everything to cool down, then the print again. Same issue at seemingly the same exact spot. I also tried a print that completed successfully last night but I am still having the same issue. Does anybody have any suggestions?
Prusa MK2S with MM upgrade
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Re: Nozzle temperature going crazy
You don't give us much to go on, but the first assumption (dangerous as those are) is a broken wire on the thermistor. Start a preheat and move the cable bundle from side to side and up and down to see if you trigger the problem. Yes - then unwrap your cables and track down the break in the cable.
Bill
Tagaytay City, Philippines
Founder member of Philippines Prusa Printer Owners FB Group
Sponsor Pillars of God Academy in Bacoor
Re: Nozzle temperature going crazy
Thanks for the advice! I tried moving the cable bundle and there was a little bit of fluctuation in the temp. Luckily, the MM1 upgrade came with a whole new hot end and I was able to swap the thermistor with the one from the old. Two successful print since then!