@daoust that R value is much lower than it should be (0.028). It means that even when the temperature is only just above ambient and the heater has been on for 10 or 20 seconds, the temperature rise is only 0.028C per second. So I think something has gone wrong with the chamber heater, or the wiring to it. Perhaps the wire has broken and it isn't working at all? Can you measure a voltage across the chamber heater when it is supposed to be turned on?
If this problem persists, please start a new thread because the problem not related to the title of this thread.
