On paper these heads are great BUT too capricious for a brand like DANFOSS 4 heads installed, 1 met display problems (intermittently empty LCD) and danfoss obviously knows the problem (called reference) but no bills so buying a new and rebelote! Admittedly this is less common so I keep (tired of dismantling and adjust the mess) but ... disappointed. So stay on the classic models from danfoss without screen!
