When are the chamber fans supposed to cut on?
I've never seen the fans turn on on their own when set to "Auto". They do work, I can set them manually and they turn on. The fan tests pass. The chamber thermistor is returning the correct temperature (or close enough). I've been printing PACF and PCCF. To answer my own question, I guess they won't turn on unless the chamber temperature goes above the nominal setting?
RE: When are the chamber fans supposed to cut on?
Hi,
yes, I am actually printing PLA all the time with a nominal temperature of 20°C (default in the PLA profiles) and the chamber fans are almost constantly on (up to the "Chamber Fans Limit"), since the chamber temperature (even with open door and everything) reach ~30° and more.
You can actually go into Control->Temperature->Chamber Temperature and set the nominal temperature to a lower one during the print to test it (the current temperature and the nominal target temperature should be shown in the footer of the status screen).