I am sorry to hear about your Sir poop-a-lot.
Do you remember if the blue led was on when you were printing?
If this wasn't the case, that means your signal cable was disconnected, and no temperature reading could be done.
Hence the overheating - melting of the peek.
What do you mean by ' I’ve had the temperature reach upwards of 350 before.'? Did you have temperature troubles before, or did you manually heat it to this temperature before, without trouble/error-messages?
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gr5 2,295
I believe the peek part can handle at least 300C so you were probably at least 10C over that.
The problem is of course in your temperature measurement. Something wrong with the thermocouple, or the tiny amplifier board on the print head or the wiring somewhere.
I would first try the wiring as that breaks often - simply swap to the alternate wiring that goes to the print head and to the UM board. Heat it back up and see if it is heating to the proper temp now (maybe heat to 95C and make sure it doesn't boil water? or maybe you have a good temp probe). I would try to fix this before ordering anything so you can order all needed parts at once.
If it is still getting too hot I would very carefully take out the thermocouple and examine it.
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