As of Home Assistant Core 2024.3 we have added a new toggle method to ClimateEntity and users can now call climate.toggle in their service calls.
Integrations that support turn_on and turn_off implicitly also support the toggle method.
Read more about the toggle method in our documentation
Example (default implementation):
async def async_toggle(self) -> None:
"""Toggle the entity."""
if self.hvac_mode == HVACMode.OFF:
await self.async_turn_on()
else:
await self.async_turn_off()