diff --git a/homeassistant/components/evohome/climate.py b/homeassistant/components/evohome/climate.py
index 50155e6dd21..37c30ce4655 100644
--- a/homeassistant/components/evohome/climate.py
+++ b/homeassistant/components/evohome/climate.py
@@ -93,20 +93,6 @@ async def async_setup_platform(
         broker.params[CONF_LOCATION_IDX],
     )
 
-    # special case of RoundModulation/RoundWireless as a single zone system
-    if len(broker.tcs.zones) == 1 and list(broker.tcs.zones.keys())[0] == "Thermostat":
-        zone = list(broker.tcs.zones.values())[0]
-        _LOGGER.debug(
-            "Found the Thermostat (%s), id=%s, name=%s",
-            zone.modelType,
-            zone.zoneId,
-            zone.name,
-        )
-        new_entity = EvoThermostat(broker, zone)
-
-        async_add_entities([new_entity], update_before_add=True)
-        return
-
     controller = EvoController(broker, broker.tcs)
 
     zones = []
@@ -134,32 +120,6 @@ class EvoClimateDevice(EvoDevice, ClimateDevice):
 
         self._preset_modes = None
 
-    async def async_tcs_svc_request(self, service: dict, data: dict) -> None:
-        """Process a service request (system mode) for a controller.
-
-        Data validation is not required, it will have been done upstream.
-        """
-        if service == SVC_SET_SYSTEM_MODE:
-            mode = data[ATTR_SYSTEM_MODE]
-        else:  # otherwise it is SVC_RESET_SYSTEM
-            mode = EVO_RESET
-
-        if ATTR_DURATION_DAYS in data:
-            until = dt.combine(dt.now().date(), dt.min.time())
-            until += data[ATTR_DURATION_DAYS]
-
-        elif ATTR_DURATION_HOURS in data:
-            until = dt.now() + data[ATTR_DURATION_HOURS]
-
-        else:
-            until = None
-
-        await self._set_tcs_mode(mode, until=until)
-
-    async def _set_tcs_mode(self, mode: str, until: Optional[dt] = None) -> None:
-        """Set a Controller to any of its native EVO_* operating modes."""
-        await self._evo_broker.call_client_api(self._evo_tcs.set_status(mode))
-
     @property
     def hvac_modes(self) -> List[str]:
         """Return a list of available hvac operation modes."""
@@ -355,7 +315,38 @@ class EvoController(EvoClimateDevice):
 
         self._precision = PRECISION_TENTHS
         self._supported_features = SUPPORT_PRESET_MODE
-        self._preset_modes = list(HA_PRESET_TO_TCS)
+
+        modes = [m["systemMode"] for m in evo_broker.config["allowedSystemModes"]]
+        self._preset_modes = [
+            TCS_PRESET_TO_HA[m] for m in modes if m in list(TCS_PRESET_TO_HA)
+        ]
+        self._supported_features = SUPPORT_PRESET_MODE if self._preset_modes else 0
+
+    async def async_tcs_svc_request(self, service: dict, data: dict) -> None:
+        """Process a service request (system mode) for a controller.
+
+        Data validation is not required, it will have been done upstream.
+        """
+        if service == SVC_SET_SYSTEM_MODE:
+            mode = data[ATTR_SYSTEM_MODE]
+        else:  # otherwise it is SVC_RESET_SYSTEM
+            mode = EVO_RESET
+
+        if ATTR_DURATION_DAYS in data:
+            until = dt.combine(dt.now().date(), dt.min.time())
+            until += data[ATTR_DURATION_DAYS]
+
+        elif ATTR_DURATION_HOURS in data:
+            until = dt.now() + data[ATTR_DURATION_HOURS]
+
+        else:
+            until = None
+
+        await self._set_tcs_mode(mode, until=until)
+
+    async def _set_tcs_mode(self, mode: str, until: Optional[dt] = None) -> None:
+        """Set a Controller to any of its native EVO_* operating modes."""
+        await self._evo_broker.call_client_api(self._evo_tcs.set_status(mode))
 
     @property
     def hvac_mode(self) -> str:
@@ -413,58 +404,3 @@ class EvoController(EvoClimateDevice):
                 attrs["activeSystemFaults"] = getattr(self._evo_tcs, attr)
             else:
                 attrs[attr] = getattr(self._evo_tcs, attr)
-
-
-class EvoThermostat(EvoZone):
-    """Base for a Honeywell TCC Round Thermostat.
-
-    These are implemented as a combined Controller/Zone.
-    """
-
-    def __init__(self, evo_broker, evo_device) -> None:
-        """Initialize the Thermostat."""
-        super().__init__(evo_broker, evo_device)
-
-        self._name = evo_broker.tcs.location.name
-        self._preset_modes = [PRESET_AWAY, PRESET_ECO]
-
-    @property
-    def hvac_mode(self) -> str:
-        """Return the current operating mode."""
-        if self._evo_tcs.systemModeStatus["mode"] == EVO_HEATOFF:
-            return HVAC_MODE_OFF
-
-        return super().hvac_mode
-
-    @property
-    def preset_mode(self) -> Optional[str]:
-        """Return the current preset mode, e.g., home, away, temp."""
-        if (
-            self._evo_tcs.systemModeStatus["mode"] == EVO_AUTOECO
-            and self._evo_device.setpointStatus["setpointMode"] == EVO_FOLLOW
-        ):
-            return PRESET_ECO
-
-        return super().preset_mode
-
-    async def async_set_hvac_mode(self, hvac_mode: str) -> None:
-        """Set an operating mode."""
-        await self._set_tcs_mode(HA_HVAC_TO_TCS.get(hvac_mode))
-
-    async def async_set_preset_mode(self, preset_mode: Optional[str]) -> None:
-        """Set the preset mode; if None, then revert to following the schedule."""
-        if preset_mode in list(HA_PRESET_TO_TCS):
-            await self._set_tcs_mode(HA_PRESET_TO_TCS.get(preset_mode))
-        else:
-            await super().async_set_hvac_mode(preset_mode)
-
-    async def async_update(self) -> None:
-        """Get the latest state data for the Thermostat."""
-        await super().async_update()
-
-        attrs = self._device_state_attrs
-        for attr in STATE_ATTRS_TCS:
-            if attr == "activeFaults":  # self._evo_device also has "activeFaults"
-                attrs["activeSystemFaults"] = getattr(self._evo_tcs, attr)
-            else:
-                attrs[attr] = getattr(self._evo_tcs, attr)