Setting temperature via lovelace floorplan

All, I’m trying to set-up a tap action to set my room temp on 20C
I have tried a lot but no succes. I try to use:

  • type: icon
    icon: ‘mdi:thermostat-box’
    entity: climate.family_room_thermostat
    tap_action:
    action: call-service
    service: climate.set_temperature
    temperature: 20
    style:
    top: 55%
    left: 42%
    image: /local/huis.png

But no succes. Who can help me?

i would also like to know

for me a simple icon i can tap would do the trick, having a card takes up more space and i need to have a separate dashboard, to much hazzle/fuss

as with my lights that has a small lightbulb icon for the thermostat a thermometer icon is more than enough