diff --git a/homeassistant/components/mqtt/config_integration.py b/homeassistant/components/mqtt/config_integration.py
index a6ed1dae54d..4a8532682fb 100644
--- a/homeassistant/components/mqtt/config_integration.py
+++ b/homeassistant/components/mqtt/config_integration.py
@@ -20,7 +20,6 @@ from . import (
     number as number_platform,
     sensor as sensor_platform,
     update as update_platform,
-    water_heater as water_heater_platform,
 )
 from .const import (
     CONF_BIRTH_MESSAGE,
@@ -76,10 +75,7 @@ CONFIG_SCHEMA_BASE = vol.Schema(
             [update_platform.PLATFORM_SCHEMA_MODERN],  # type: ignore[has-type]
         ),
         Platform.VACUUM.value: vol.All(cv.ensure_list, [dict]),
-        Platform.WATER_HEATER.value: vol.All(
-            cv.ensure_list,
-            [water_heater_platform.PLATFORM_SCHEMA_MODERN],  # type: ignore[has-type]
-        ),
+        Platform.WATER_HEATER.value: vol.All(cv.ensure_list, [dict]),
     }
 )
 
diff --git a/homeassistant/components/mqtt/water_heater.py b/homeassistant/components/mqtt/water_heater.py
index 9a9326d6d07..99cc35f74a4 100644
--- a/homeassistant/components/mqtt/water_heater.py
+++ b/homeassistant/components/mqtt/water_heater.py
@@ -1,7 +1,6 @@
 """Support for MQTT water heater devices."""
 from __future__ import annotations
 
-import functools
 import logging
 from typing import Any
 
@@ -38,7 +37,7 @@ from homeassistant.core import HomeAssistant, callback
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.template import Template
-from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
+from homeassistant.helpers.typing import ConfigType
 from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .climate import MqttTemperatureControlEntity
@@ -67,7 +66,7 @@ from .const import (
 from .debug_info import log_messages
 from .mixins import (
     MQTT_ENTITY_COMMON_SCHEMA,
-    async_setup_entry_helper,
+    async_mqtt_entry_helper,
     write_state_on_attr_change,
 )
 from .models import MqttCommandTemplate, MqttValueTemplate, ReceiveMessage
@@ -170,21 +169,15 @@ async def async_setup_entry(
     async_add_entities: AddEntitiesCallback,
 ) -> None:
     """Set up MQTT water heater device through YAML and through MQTT discovery."""
-    setup = functools.partial(
-        _async_setup_entity, hass, async_add_entities, config_entry=config_entry
+    await async_mqtt_entry_helper(
+        hass,
+        config_entry,
+        MqttWaterHeater,
+        water_heater.DOMAIN,
+        async_add_entities,
+        DISCOVERY_SCHEMA,
+        PLATFORM_SCHEMA_MODERN,
     )
-    await async_setup_entry_helper(hass, water_heater.DOMAIN, setup, DISCOVERY_SCHEMA)
-
-
-async def _async_setup_entity(
-    hass: HomeAssistant,
-    async_add_entities: AddEntitiesCallback,
-    config: ConfigType,
-    config_entry: ConfigEntry,
-    discovery_data: DiscoveryInfoType | None = None,
-) -> None:
-    """Set up the MQTT water heater devices."""
-    async_add_entities([MqttWaterHeater(hass, config, config_entry, discovery_data)])
 
 
 class MqttWaterHeater(MqttTemperatureControlEntity, WaterHeaterEntity):