@PaulHew said in heats up once, then no more:
Not trying to teach you to suck eggs!
Have you run the auto calibration?
Yes. Ran it on the first heater when i noticed it didn´t reach temp. Failed to reach temp.
On the 2nd heater, the pid tuning was the first run .... ran fine but afterwards same behavior as first heater.
already swapped out pt100 with a spare one, same result so it is not the pt100.
Don´t have a spare heater to test with this weekend