I don't believe setting 0 for fan speed is automatic. I've never experienced it doing anything other than blowing at ultra low speed when in that position.
If the temperature setting works OK at its extremes but not well in the intermediate range, it's possible that the thermistor (temperature sensor) needs looking at. It's located in the CCU. Tore B may have a fix for this.
If the temperature setting works OK at its extremes but not well in the intermediate range, it's possible that the thermistor (temperature sensor) needs looking at. It's located in the CCU. Tore B may have a fix for this.