I think it’s really weird that I cannot change the mod (from automatic to manuel e.g.) from within Hass. Also away/home mode etc. does not work when trying to set it through hass.
The homematic ip app does not show the current temperatures of a heater thermostat, maybe we can also extract that.
I use the Homematic IP(Local) integration with Debmatic, which could have an influence.
I use the call service - climate: set preset mode too, but I use it on a device and not an entity and I use just boost and none as values (no double quotes and no capital letters).