diff --git a/homeassistant/components/opentherm_gw/__init__.py b/homeassistant/components/opentherm_gw/__init__.py
index a57ae7db6016fa..dfce2206df764c 100644
--- a/homeassistant/components/opentherm_gw/__init__.py
+++ b/homeassistant/components/opentherm_gw/__init__.py
@@ -90,7 +90,7 @@
     extra=vol.ALLOW_EXTRA,
 )
 
-PLATFORMS = [Platform.BINARY_SENSOR, Platform.CLIMATE, Platform.SENSOR]
+PLATFORMS = [Platform.BINARY_SENSOR, Platform.BUTTON, Platform.CLIMATE, Platform.SENSOR]
 
 
 async def options_updated(hass: HomeAssistant, entry: ConfigEntry) -> None:
diff --git a/homeassistant/components/opentherm_gw/button.py b/homeassistant/components/opentherm_gw/button.py
new file mode 100644
index 00000000000000..aa0a3dbcda5aa4
--- /dev/null
+++ b/homeassistant/components/opentherm_gw/button.py
@@ -0,0 +1,73 @@
+"""Support for OpenTherm Gateway buttons."""
+
+from collections.abc import Awaitable, Callable
+from dataclasses import dataclass
+
+import pyotgw.vars as gw_vars
+
+from homeassistant.components.button import (
+    ButtonDeviceClass,
+    ButtonEntity,
+    ButtonEntityDescription,
+)
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_ID, EntityCategory
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from . import OpenThermGatewayHub
+from .const import (
+    DATA_GATEWAYS,
+    DATA_OPENTHERM_GW,
+    GATEWAY_DEVICE_DESCRIPTION,
+    OpenThermDataSource,
+)
+from .entity import OpenThermEntity, OpenThermEntityDescription
+
+
+@dataclass(frozen=True, kw_only=True)
+class OpenThermButtonEntityDescription(
+    ButtonEntityDescription, OpenThermEntityDescription
+):
+    """Describes an opentherm_gw button entity."""
+
+    action: Callable[[OpenThermGatewayHub], Awaitable]
+
+
+BUTTON_DESCRIPTIONS: tuple[OpenThermButtonEntityDescription, ...] = (
+    OpenThermButtonEntityDescription(
+        key="restart_button",
+        device_class=ButtonDeviceClass.RESTART,
+        device_description=GATEWAY_DEVICE_DESCRIPTION,
+        action=lambda hub: hub.gateway.set_mode(gw_vars.OTGW_MODE_RESET),
+    ),
+)
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+    async_add_entities: AddEntitiesCallback,
+) -> None:
+    """Set up the OpenTherm Gateway buttons."""
+    gw_hub = hass.data[DATA_OPENTHERM_GW][DATA_GATEWAYS][config_entry.data[CONF_ID]]
+
+    async_add_entities(
+        OpenThermButton(gw_hub, description) for description in BUTTON_DESCRIPTIONS
+    )
+
+
+class OpenThermButton(OpenThermEntity, ButtonEntity):
+    """Representation of an OpenTherm button."""
+
+    _attr_entity_category = EntityCategory.CONFIG
+    entity_description: OpenThermButtonEntityDescription
+
+    @callback
+    def receive_report(self, status: dict[OpenThermDataSource, dict]) -> None:
+        """Handle status updates from the component."""
+        # We don't need any information from the reports here
+
+    async def async_press(self) -> None:
+        """Perform button action."""
+        await self.entity_description.action(self._gateway)
diff --git a/tests/components/opentherm_gw/test_button.py b/tests/components/opentherm_gw/test_button.py
new file mode 100644
index 00000000000000..b02a9d9fef0738
--- /dev/null
+++ b/tests/components/opentherm_gw/test_button.py
@@ -0,0 +1,50 @@
+"""Test opentherm_gw buttons."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+from pyotgw.vars import OTGW_MODE_RESET
+
+from homeassistant.components.button import DOMAIN as BUTTON_DOMAIN, SERVICE_PRESS
+from homeassistant.components.opentherm_gw import DOMAIN as OPENTHERM_DOMAIN
+from homeassistant.components.opentherm_gw.const import OpenThermDeviceIdentifier
+from homeassistant.const import ATTR_ENTITY_ID, CONF_ID
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers import entity_registry as er
+
+from .conftest import MINIMAL_STATUS
+
+from tests.common import MockConfigEntry
+
+
+async def test_restart_button(
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    mock_config_entry: MockConfigEntry,
+    mock_pyotgw: MagicMock,
+) -> None:
+    """Test restart button."""
+
+    mock_pyotgw.return_value.set_mode = AsyncMock(return_value=MINIMAL_STATUS)
+    mock_config_entry.add_to_hass(hass)
+
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert (
+        button_entity_id := entity_registry.async_get_entity_id(
+            BUTTON_DOMAIN,
+            OPENTHERM_DOMAIN,
+            f"{mock_config_entry.data[CONF_ID]}-{OpenThermDeviceIdentifier.GATEWAY}-restart_button",
+        )
+    ) is not None
+
+    await hass.services.async_call(
+        BUTTON_DOMAIN,
+        SERVICE_PRESS,
+        {
+            ATTR_ENTITY_ID: button_entity_id,
+        },
+        blocking=True,
+    )
+
+    mock_pyotgw.return_value.set_mode.assert_awaited_once_with(OTGW_MODE_RESET)