Thanks @OF , I opened my atty and realized the ceramic cup was not attached to the base, so the contact might be very poor. I tried to fix it back like it was but ceramic cup legs was too short, so I removed the ceramic base where the ceramic cup sits (between the metal base and the cup) to be able to fix the legs in the posts and added an o-ring on the top of the cup to compensate and make a good seal. Now my dry herb cart work very well and doesn't shutoff in power mode anymore! I'm working on settings now, TC Ni mode, 320°F seems to get the job. Before I was using 400°F and my first bowl after rebuild I tried that and combusted a bit... what is your favourite setting, please? Thanks again!