diff --git a/homeassistant/components/incomfort/config_flow.py b/homeassistant/components/incomfort/config_flow.py
index bfc43faacf2..3db8e40f9f4 100644
--- a/homeassistant/components/incomfort/config_flow.py
+++ b/homeassistant/components/incomfort/config_flow.py
@@ -10,6 +10,7 @@ from incomfortclient import IncomfortError, InvalidHeaterList
 import voluptuous as vol
 
 from homeassistant.config_entries import (
+    SOURCE_RECONFIGURE,
     ConfigEntry,
     ConfigFlow,
     ConfigFlowResult,
@@ -106,15 +107,31 @@ class InComfortConfigFlow(ConfigFlow, domain=DOMAIN):
     ) -> ConfigFlowResult:
         """Handle the initial step."""
         errors: dict[str, str] | None = None
+        data_schema: vol.Schema = CONFIG_SCHEMA
+        if is_reconfigure := (self.source == SOURCE_RECONFIGURE):
+            reconfigure_entry = self._get_reconfigure_entry()
+            data_schema = self.add_suggested_values_to_schema(
+                data_schema, reconfigure_entry.data
+            )
         if user_input is not None:
-            self._async_abort_entries_match({CONF_HOST: user_input[CONF_HOST]})
             if (
-                errors := await async_try_connect_gateway(self.hass, user_input)
+                errors := await async_try_connect_gateway(
+                    self.hass,
+                    (reconfigure_entry.data | user_input)
+                    if is_reconfigure
+                    else user_input,
+                )
             ) is None:
+                if is_reconfigure:
+                    return self.async_update_reload_and_abort(
+                        reconfigure_entry, data_updates=user_input
+                    )
+                self._async_abort_entries_match({CONF_HOST: user_input[CONF_HOST]})
                 return self.async_create_entry(title=TITLE, data=user_input)
+            data_schema = self.add_suggested_values_to_schema(data_schema, user_input)
 
         return self.async_show_form(
-            step_id="user", data_schema=CONFIG_SCHEMA, errors=errors
+            step_id="user", data_schema=data_schema, errors=errors
         )
 
     async def async_step_reauth(
@@ -145,6 +162,12 @@ class InComfortConfigFlow(ConfigFlow, domain=DOMAIN):
             step_id="reauth_confirm", data_schema=REAUTH_SCHEMA, errors=errors
         )
 
+    async def async_step_reconfigure(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Handle reconfiguration flow."""
+        return await self.async_step_user()
+
 
 class InComfortOptionsFlowHandler(OptionsFlow):
     """Handle InComfort Lan2RF gateway options."""
diff --git a/homeassistant/components/incomfort/strings.json b/homeassistant/components/incomfort/strings.json
index 9fd31ae1c6f..2f2f526421a 100644
--- a/homeassistant/components/incomfort/strings.json
+++ b/homeassistant/components/incomfort/strings.json
@@ -31,6 +31,7 @@
       "not_found": "No Lan2RF gateway found.",
       "timeout_error": "Time out when connection to Lan2RF gateway.",
       "reauth_successful": "[%key:common::config_flow::abort::reauth_successful%]",
+      "reconfigure_successful": "[%key:common::config_flow::abort::reconfigure_successful%]",
       "unknown": "Unknown error when connection to Lan2RF gateway."
     },
     "error": {
diff --git a/tests/components/incomfort/test_config_flow.py b/tests/components/incomfort/test_config_flow.py
index 0c5ef2f31b1..9ab5a672d61 100644
--- a/tests/components/incomfort/test_config_flow.py
+++ b/tests/components/incomfort/test_config_flow.py
@@ -39,7 +39,9 @@ async def test_form(
     assert len(mock_setup_entry.mock_calls) == 1
 
 
-async def test_entry_already_configured(hass: HomeAssistant) -> None:
+async def test_entry_already_configured(
+    hass: HomeAssistant, mock_incomfort: MagicMock
+) -> None:
     """Test aborting if the entry is already configured."""
     entry = MockConfigEntry(domain=DOMAIN, data=MOCK_CONFIG)
     entry.add_to_hass(hass)
@@ -168,6 +170,58 @@ async def test_reauth_flow_failure(
     assert result["reason"] == "reauth_successful"
 
 
+async def test_reconfigure_flow_success(
+    hass: HomeAssistant,
+    mock_incomfort: MagicMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test the re-configure flow succeeds."""
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+
+    result = await mock_config_entry.start_reconfigure_flow(hass)
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input=MOCK_CONFIG | {CONF_PASSWORD: "new-password"},
+    )
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reconfigure_successful"
+
+
+async def test_reconfigure_flow_failure(
+    hass: HomeAssistant,
+    mock_incomfort: MagicMock,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test the re-configure flow fails."""
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+
+    result = await mock_config_entry.start_reconfigure_flow(hass)
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+
+    with patch.object(
+        mock_incomfort(),
+        "heaters",
+        side_effect=IncomfortError(ClientResponseError(None, None, status=401)),
+    ):
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            user_input=MOCK_CONFIG | {CONF_PASSWORD: "wrong-password"},
+        )
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"] == {CONF_PASSWORD: "auth_error"}
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        user_input=MOCK_CONFIG | {CONF_PASSWORD: "new-password"},
+    )
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "reconfigure_successful"
+
+
 @pytest.mark.parametrize(
     ("user_input", "legacy_setpoint_status"),
     [