Original hotend got jammed and when replacing the nozzle the unit was twisting till the heat sock split and the ceramic broke.
Replaced with new hotend but when attempting to heat up the temp sensor shows no change and is still call to the touch until the system fails with a “not heating as expected” error.
I’ve replaced the breakout board as well as thought I may have damaged it when changing the hotend but the issue persists.
What can I attempt next?
Hi @Duras_TK26976 
Trust you are well. I’ve seen a few users complaining about the same thing after a hotend swap on some of the other forums. When the printer throws the ‘not heating as expected’ error and the hotend stays cold, it usually means the heater isn’t actually getting power.
I’d start by reseating the heater and thermistor connectors on the toolhead breakout board. On these printers it’s pretty easy for a pin to push back slightly or for a connector to not seat fully. It’s also worth checking the toolhead cable harness, since twisting the hotend can stress or partially break the heater wires.
If everything looks fine there, it’s possible the heater in the replacement hotend is faulty, which does happen occasionally even with new units. Basically the odd lemon.
You could also check the heater in the replacement hotend with a multimeter. If you disconnect the heater wires and measure the resistance across them, you should usually read somewhere around 4-7 ohms if memory serves me well. If the meter shows very high or very low resistance then the heater element is likely dead or shorted, which would explain why the hotend never warms up.
Let us know how it goes. If this doesn’t resolve it, get in touch with Creality Support so that they can advise accordingly.
Thanks for that information… I picked up a cheap multimeter as I couldn’t find mine.
Couldn’t get a reading off the hotend connector for resistance but I carefully monitored the voltage on the pins when it was set to heat and was getting 25v so I presume that means the board is OK and it’s the new hotend that is dead
@Duras_TK26976 you’re most welcome Given no reading, I’d say it’s safe to assume that it’s a lemon. My recommendation would be to return it to the seller and to get a replacement/refund for your purchase.
@Alawhie just came back to say thanks again …. the voltage reading gave me the confidence to take a chance and get the microswiss hotend upgrade which I just plugged in then heated up fine and I’ve just ran the PID tuning
over my past year with this printer, I have had 2 brand-new creality hotends not work. They will not heat at all, and when I plug another one in, everything is fine. I’ve had to return the hotends.