diff --git a/homeassistant/components/flexit_bacnet/icons.json b/homeassistant/components/flexit_bacnet/icons.json
index 07423f8fd126..434f2338ec06 100644
--- a/homeassistant/components/flexit_bacnet/icons.json
+++ b/homeassistant/components/flexit_bacnet/icons.json
@@ -59,12 +59,6 @@
         "state": {
           "off": "mdi:radiator-off"
         }
-      },
-      "fireplace_mode": {
-        "default": "mdi:fireplace",
-        "state": {
-          "off": "mdi:fireplace-off"
-        }
       }
     }
   }
diff --git a/homeassistant/components/flexit_bacnet/strings.json b/homeassistant/components/flexit_bacnet/strings.json
index 8b9ff3c0199a..d4a9c975d102 100644
--- a/homeassistant/components/flexit_bacnet/strings.json
+++ b/homeassistant/components/flexit_bacnet/strings.json
@@ -126,9 +126,6 @@
       },
       "electric_heater": {
         "name": "Electric heater"
-      },
-      "fireplace_mode": {
-        "name": "Fireplace mode"
       }
     }
   },
@@ -151,11 +148,5 @@
     "switch_turn": {
       "message": "Failed to turn the switch {state}."
     }
-  },
-  "issues": {
-    "deprecated_fireplace_switch": {
-      "description": "The fireplace mode switch entity `{entity_id}` is deprecated and will be removed in Home Assistant 2026.9.\n\nFireplace mode has been moved to a climate preset on the climate entity to better match the device interface.\n\nPlease update your automations to use the `climate.set_preset_mode` action with preset mode `fireplace` instead of using the switch entity.\n\nAfter updating your automations, you can safely disable this switch entity.",
-      "title": "Fireplace mode switch is deprecated"
-    }
   }
 }
diff --git a/homeassistant/components/flexit_bacnet/switch.py b/homeassistant/components/flexit_bacnet/switch.py
index 191e49e42eef..90ebf0eda026 100644
--- a/homeassistant/components/flexit_bacnet/switch.py
+++ b/homeassistant/components/flexit_bacnet/switch.py
@@ -13,12 +13,9 @@ from homeassistant.components.switch import (
     SwitchEntity,
     SwitchEntityDescription,
 )
-from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
-from homeassistant.helpers import entity_registry as er
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
-from homeassistant.helpers.issue_registry import IssueSeverity, async_create_issue
 
 from .const import DOMAIN
 from .coordinator import FlexitConfigEntry, FlexitCoordinator
@@ -49,13 +46,6 @@ SWITCHES: tuple[FlexitSwitchEntityDescription, ...] = (
         turn_on_fn=lambda data: data.activate_cooker_hood(),
         turn_off_fn=lambda data: data.deactivate_cooker_hood(),
     ),
-    FlexitSwitchEntityDescription(
-        key="fireplace_mode",
-        translation_key="fireplace_mode",
-        is_on_fn=lambda data: data.fireplace_ventilation_status,
-        turn_on_fn=lambda data: data.trigger_fireplace_mode(),
-        turn_off_fn=lambda data: data.trigger_fireplace_mode(),
-    ),
 )
 
 
@@ -67,43 +57,9 @@ async def async_setup_entry(
     """Set up Flexit (bacnet) switch from a config entry."""
     coordinator = config_entry.runtime_data
 
-    entities: list[FlexitSwitch] = []
-    for description in SWITCHES:
-        if description.key == "fireplace_mode":
-            # Check if deprecated fireplace switch is enabled and create repair issue
-            entity_reg = er.async_get(hass)
-            fireplace_switch_unique_id = (
-                f"{coordinator.device.serial_number}-fireplace_mode"
-            )
-            # Look up the fireplace switch entity by unique_id
-            fireplace_switch_entity_id = entity_reg.async_get_entity_id(
-                Platform.SWITCH, DOMAIN, fireplace_switch_unique_id
-            )
-            if not fireplace_switch_entity_id:
-                continue
-            entity_registry_entry = entity_reg.async_get(fireplace_switch_entity_id)
-
-            if entity_registry_entry:
-                if entity_registry_entry.disabled:
-                    entity_reg.async_remove(fireplace_switch_entity_id)
-                else:
-                    async_create_issue(
-                        hass,
-                        DOMAIN,
-                        f"deprecated_switch_{fireplace_switch_unique_id}",
-                        breaks_in_ha_version="2026.9.0",
-                        is_fixable=False,
-                        issue_domain=DOMAIN,
-                        severity=IssueSeverity.WARNING,
-                        translation_key="deprecated_fireplace_switch",
-                        translation_placeholders={
-                            "entity_id": fireplace_switch_entity_id,
-                        },
-                    )
-                    entities.append(FlexitSwitch(coordinator, description))
-        else:
-            entities.append(FlexitSwitch(coordinator, description))
-    async_add_entities(entities)
+    async_add_entities(
+        FlexitSwitch(coordinator, description) for description in SWITCHES
+    )
 
 
 PARALLEL_UPDATES = 1