diff --git a/homeassistant/components/coolmaster/config_flow.py b/homeassistant/components/coolmaster/config_flow.py
index c674146fd15..7c9b4d5d065 100644
--- a/homeassistant/components/coolmaster/config_flow.py
+++ b/homeassistant/components/coolmaster/config_flow.py
@@ -54,7 +54,7 @@ class CoolmasterConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
             if not result:
                 errors["base"] = "no_units"
         except (OSError, ConnectionRefusedError, TimeoutError):
-            errors["base"] = "connection_error"
+            errors["base"] = "cannot_connect"
 
         if errors:
             return self.async_show_form(
diff --git a/homeassistant/components/coolmaster/strings.json b/homeassistant/components/coolmaster/strings.json
index fd91e5576d2..7afc012a191 100644
--- a/homeassistant/components/coolmaster/strings.json
+++ b/homeassistant/components/coolmaster/strings.json
@@ -15,8 +15,8 @@
       }
     },
     "error": {
-      "connection_error": "Failed to connect to CoolMasterNet instance. Please check your host.",
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
       "no_units": "Could not find any HVAC units in CoolMasterNet host."
     }
   }
-}
\ No newline at end of file
+}
diff --git a/tests/components/coolmaster/test_config_flow.py b/tests/components/coolmaster/test_config_flow.py
index fc296a53ddf..b758a37db1d 100644
--- a/tests/components/coolmaster/test_config_flow.py
+++ b/tests/components/coolmaster/test_config_flow.py
@@ -60,7 +60,7 @@ async def test_form_timeout(hass):
         )
 
     assert result2["type"] == "form"
-    assert result2["errors"] == {"base": "connection_error"}
+    assert result2["errors"] == {"base": "cannot_connect"}
 
 
 async def test_form_connection_refused(hass):
@@ -78,7 +78,7 @@ async def test_form_connection_refused(hass):
         )
 
     assert result2["type"] == "form"
-    assert result2["errors"] == {"base": "connection_error"}
+    assert result2["errors"] == {"base": "cannot_connect"}
 
 
 async def test_form_no_units(hass):