diff --git a/homeassistant/components/suez_water/config_flow.py b/homeassistant/components/suez_water/config_flow.py
index ac09cf4a1d3bea..2a1edea35f1480 100644
--- a/homeassistant/components/suez_water/config_flow.py
+++ b/homeassistant/components/suez_water/config_flow.py
@@ -37,16 +37,19 @@ async def validate_input(data: dict[str, Any]) -> None:
             data[CONF_PASSWORD],
             counter_id,
         )
-        if not await client.check_credentials():
-            raise InvalidAuth
-    except PySuezError as ex:
-        raise CannotConnect from ex
-
-    if counter_id is None:
         try:
-            data[CONF_COUNTER_ID] = await client.find_counter()
+            if not await client.check_credentials():
+                raise InvalidAuth
         except PySuezError as ex:
-            raise CounterNotFound from ex
+            raise CannotConnect from ex
+
+        if counter_id is None:
+            try:
+                data[CONF_COUNTER_ID] = await client.find_counter()
+            except PySuezError as ex:
+                raise CounterNotFound from ex
+    finally:
+        await client.close_session()
 
 
 class SuezWaterConfigFlow(ConfigFlow, domain=DOMAIN):