<p>I've just installed a new 12 V hotend for my Prusa i3 MK8. So, now the new hotend can't achieve temperatures above 190-200 °C and it takes about 30 minutes to achieve 200 °C. The thermistor and heating element both touch the hotend securely. The heating element gets 12 V all the time. PID changes don't seem to affect anything. Can it be fixed or do I have to change the hotend?</p>

CC BY-SA 4.0
2022-10-22T18:55:20.117Z
If the MK8 is a typographical error and should be MK3. Prusa MK3 printers are 24v. Confusing the issue is that you've noted you measured 12v (?) which implies it's a different model than a MK3.
fred_dot_u
CC BY-SA 4.0
2022-10-24T10:50:28.013Z
Have you installed a 24V heater cartridge into a 12V printer? That will turn a 40W heater into a 10W heater,
Mick
<prusa-i3><hotend><temperature>
Prusa i3 MK8 can't achieve required temperature
Антон Буланча
# Prusa i3 MK8 can't achieve required temperature

(Asked by: username_0 on 2022-10-22)

I've just installed a new 12 V hotend for my Prusa i3 MK8. So, now the new hotend can't achieve temperatures above 190-200 °C and it takes about 30 minutes to achieve 200 °C. The thermistor and heating element both touch the hotend securely. The heating element gets 12 V all the time. PID changes don't seem to affect anything. Can it be fixed or do I have to change the hotend?

**Tags:** prusa-i3, hotend, temperature

> **Comments:**
> **username_1**: If the MK8 is a typographical error and should be MK3. Prusa MK3 printers are 24v. Confusing the issue is that you've noted you measured 12v (?) which implies it's a different model than a MK3.  
> **username_2**: Have you installed a 24V heater cartridge into a 12V printer? That will turn a 40W heater into a 10W heater,  

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## 0 answers

