Welcome to the SeeMeCNC Community

I habve had a clogged nozzle today, so i removed the nozzle and cleaned it. After that i have a cold temp reading of about 10 degree at the nozzle, instead of about 25deg what's realistic.

If I heat up the nozzle, the temperature rises, but i don't trust it.
Is there any failure that can lead to such a behaviour?

I have ordered a new temp sensor, just in case.

Thank you

Do you have a multimeter with temp probe to test the temp? The thermistors are a bit fragile at times, especially the tiny GT2 ones that E3D and SeeMe seem to love.