diff --git a/kiosk/src/main.rs b/kiosk/src/main.rs
index 818be9d..f183ca2 100644
--- a/kiosk/src/main.rs
+++ b/kiosk/src/main.rs
@@ -28,6 +28,8 @@ pub enum ServerMsg {
     },
     /// Server-pushed "go check for a firmware update now".
     FirmwareCheck,
+    /// Server-pushed "go check for an OS update now".
+    OsCheck,
     /// Show terminal auth code on screen (overlay).
     ShowTerminalCode(String),
     /// Dismiss the terminal code overlay.
diff --git a/kiosk/src/ui.rs b/kiosk/src/ui.rs
index 8d6fee8..ce85cc8 100644
--- a/kiosk/src/ui.rs
+++ b/kiosk/src/ui.rs
@@ -265,6 +265,9 @@ fn activate(app: &Application) {
                     ServerMsg::FirmwareCheck => {
                         maybe_apply_firmware_update(&server_for_reload, &key_for_reload);
                     }
+                    ServerMsg::OsCheck => {
+                        maybe_apply_os_update(&server_for_reload, &key_for_reload);
+                    }
                     ServerMsg::ShowTerminalCode(code) => {
                         let _ = tx_for_reload.send(WorkerMsg::ShowTerminalCode(code));
                     }
diff --git a/kiosk/src/ws_client.rs b/kiosk/src/ws_client.rs
index a750932..5e51a52 100644
--- a/kiosk/src/ws_client.rs
+++ b/kiosk/src/ws_client.rs
@@ -173,6 +173,8 @@ async fn handle_message(
         }
     } else if text.contains("\"type\":\"firmware_check\"") {
         let _ = tx.send(ServerMsg::FirmwareCheck);
+    } else if text.contains("\"type\":\"os_check\"") {
+        let _ = tx.send(ServerMsg::OsCheck);
     } else if text.contains("\"type\":\"fan\"") {
         let Ok(msg) = serde_json::from_str::<serde_json::Value>(text) else { return };
         let pwm = if msg.get("mode").and_then(|v| v.as_str()) == Some("auto") {
diff --git a/server/src/plugins/service-admin-http/routes-os-updates.ts b/server/src/plugins/service-admin-http/routes-os-updates.ts
index 0b5b596..6e0f4d5 100644
--- a/server/src/plugins/service-admin-http/routes-os-updates.ts
+++ b/server/src/plugins/service-admin-http/routes-os-updates.ts
@@ -63,6 +63,14 @@ export function registerOsUpdateRoutes(app: H3, deps: AdminDeps): void {
     return htmlFragment(KioskOsUpdatePanel({ kiosk: k, releases }));
   });
 
+  // Push OS update now: server pings the kiosk via WS coordinator.
+  app.post("/admin/kiosks/:id/os-update/push", (event) => {
+    const id = Number(getRouterParam(event, "id"));
+    const { getCoordinator } = require("../../shared/coordinator-registry.js");
+    const dispatched = getCoordinator().sendToKiosk(id, { type: "os_check" });
+    return { ok: true, dispatched };
+  });
+
   // ---- Rollouts -----------------------------------------------------------
   app.get("/admin/os-updates/rollouts", (event) => {
     const user = event.context.user!;
diff --git a/server/src/web-templates/admin-pages.tsx b/server/src/web-templates/admin-pages.tsx
index 4b0d638..47730f6 100644
--- a/server/src/web-templates/admin-pages.tsx
+++ b/server/src/web-templates/admin-pages.tsx
@@ -3827,8 +3827,16 @@ export function KioskOsUpdatePanel(props: KioskOsUpdatePanelProps) {
             ))}
           </select>
         </div>
-        <div style="grid-column:1/-1">
+        <div style="grid-column:1/-1; display:flex; gap:0.5rem">
           <button type="submit" class="btn btn-primary">Save</button>
+          <button
+            type="button"
+            class="btn"
+            {...{
+              "hx-post": `/admin/kiosks/${String(k.id)}/os-update/push`,
+              "hx-swap": "none",
+            }}
+          >Push OS update now</button>
         </div>
       </form>
     </div>