Hey guys, i am hoping someone can help as this is driving me nuts. I havw this heat pump dryer (samsung DV90K6000CX) it switches off after between a minute and 5 minutes with no error codes at all. I have completely stripped the machine and even taken out the whole heat exchanger unit and cleaned it until its immaculate. i have cleaned the moisture sensor etc and cleaned the whole machine inside and outside (filters etc). Just a bit of extra info it also switches off in timed mode. The drum runs great, the pump seems to be working as i can hear it and i can hear the pump on the heat echanger unit switching on. Does anyone have any advice please? TIA.