Hi! In fancontrol MINSTART has no effect (it has, but only for an INTERVAL period of time). The line: pwmval="(${tval}-${mint})*(${maxpwm}-${minso})/(${maxt}-${mint})+${minso}" should be: pwmval="(${tval}-${mint})*(${maxpwm}-${minsa})/(${maxt}-${mint})+${minsa}" if I understand the configuration options of fancontrol right. At the current state, pwmval can be lower than MINSTART (so on some temperatures, greater than MINTEMP, the fan won't start). Regards, Bal?zs