Incorrect ambient temperature detection may be due to non-optimal positioning of the Comfort Control electronic control, code 215510/215510 BLK. If the radiators are recessed in a niche, are totally or partially covered, or if the “Comfort Control” controls are installed on very high radiators or at floor level, it is preferable to install an ambient temperature sensor, code 215001/215001 BLK, to improve temperature detection.