diff --git a/kobrax_moonraker_bridge.py b/kobrax_moonraker_bridge.py
index fb2c09d..f6070a9 100644
--- a/kobrax_moonraker_bridge.py
+++ b/kobrax_moonraker_bridge.py
@@ -453,6 +453,7 @@ class KobraXBridge:
         self._ams_loaded_slot: int = -1        # global slot index of currently loaded slot
         self._pending_load_slot: int = -1      # global slot index requested via /api/ams/feed type=1
         self._ace_box_ids: list[int] = []      # detected ACE unit IDs (0..3)
+        self._ace_auto_feed: dict[int, int] = {}   # per-box auto_feed state (0/1)
         self._head_tools_model: int = -1
         self._filament_mode: str = "toolhead"
         self._last_uploaded_file: str = ""
@@ -821,6 +822,10 @@ class KobraXBridge:
         global_slots, global_loaded = self._aggregate_slots(boxes, self._filament_mode)
         self._ams_loaded_slot = global_loaded
         self._update_ace_drying_state(data, boxes)
+        for box in boxes:
+            bid = int(box.get("id", -1))
+            if 0 <= bid <= 3 and "auto_feed" in box:
+                self._ace_auto_feed[bid] = int(box["auto_feed"])
         if self._pending_load_slot >= 0 and global_loaded == self._pending_load_slot:
           self._pending_load_slot = -1
         activity_map = self._slot_activity_map(boxes, global_loaded)
@@ -3218,7 +3223,11 @@ function applyState(){
     if(!show)continue;
     var ud=unitMap[i]||dry;
     var refillToggle=document.getElementById('ace-auto-refill-toggle-'+i);
-    if(refillToggle)refillToggle.checked=_aceAutoRefillGet(i);
+    var autoFeedMap=s.ace_auto_feed||{};
+    if(refillToggle&&!_aceAutoFeedPending[i]){
+      var afVal=autoFeedMap.hasOwnProperty(String(i))?Number(autoFeedMap[String(i)]):(_aceAutoRefillGet(i)?1:0);
+      refillToggle.checked=afVal===1;
+    }
     var dryToggle=document.getElementById('ace-dry-enable-toggle-'+i);
     if(dryToggle)dryToggle.checked=Number(ud.status||0)>0;
     var hh=document.getElementById('d-ace-dry-humidity-'+i);
@@ -3755,11 +3764,19 @@ function aceDryStart(aceId){
     .catch(function(e){clog('ACE-Fehler: '+e,'msg-err');});
 }
 
+var _aceAutoFeedPending={};
 function aceAutoRefillToggle(aceId){
   aceId=(typeof aceId==='number'&&aceId>=0)?aceId:0;
   var on=!!((document.getElementById('ace-auto-refill-toggle-'+aceId)||{}).checked);
-  _aceAutoRefillSet(aceId,on);
-  clog('ACE '+(aceId+1)+' - '+(T.ace_dry_auto_refill||'Auto Refill')+': '+(on?'ON':'OFF')+' '+(T.ace_dry_ui_pending||'(UI only, backend next)'),'msg-info');
+  _aceAutoFeedPending[aceId]=true;
+  fetch('/api/ace/auto_feed',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({ace_id:aceId,on:on?1:0})})
+    .then(function(r){return r.json();})
+    .then(function(d){
+      delete _aceAutoFeedPending[aceId];
+      if(d.error){clog('Auto Refill error: '+d.error,'msg-err');var t=document.getElementById('ace-auto-refill-toggle-'+aceId);if(t)t.checked=!on;return;}
+      clog('ACE '+(aceId+1)+' - '+(T.ace_dry_auto_refill||'Auto Refill')+': '+(on?'ON':'OFF'),'msg-ok');
+    })
+    .catch(function(e){delete _aceAutoFeedPending[aceId];clog('Auto Refill error: '+e,'msg-err');var t=document.getElementById('ace-auto-refill-toggle-'+aceId);if(t)t.checked=!on;});
 }
 
 function openAceDryDialog(aceId){
@@ -4764,6 +4781,36 @@ function loadPrinterTab(){
         await loop.run_in_executor(None, _send)
         return web.json_response({"result": "ok"})
 
+    async def handle_api_ace_auto_feed(self, request):
+        try:
+            body = await request.json()
+        except Exception:
+            body = {}
+
+        ace_id_raw = body.get("ace_id", None)
+        on_raw = body.get("on", None)
+        if ace_id_raw is None or on_raw is None:
+            return web.json_response({"error": "ace_id and on are required"}, status=400)
+        try:
+            ace_id = int(ace_id_raw)
+            on = int(bool(on_raw))
+        except Exception:
+            return web.json_response({"error": "invalid parameters"}, status=400)
+        if not (0 <= ace_id <= 3):
+            return web.json_response({"error": "ace_id must be 0-3"}, status=400)
+
+        payload = {"multi_color_box": [{"id": ace_id, "auto_feed": on}]}
+        loop = asyncio.get_event_loop()
+        # Fire-and-forget: setAutoFeed ACK arrives via multiColorBox/report callback.
+        # Waiting for a response on that busy push topic causes false "code:0" rejections.
+        await loop.run_in_executor(
+            None,
+            lambda: self.client.publish("multiColorBox", "setAutoFeed", payload, timeout=0)
+        )
+        self._ace_auto_feed[ace_id] = on
+        self._state_dirty = True
+        return web.json_response({"result": "ok", "ace_id": ace_id, "auto_feed": on})
+
     async def handle_api_ace_dry(self, request):
         try:
             body = await request.json()
@@ -5087,6 +5134,7 @@ function loadPrinterTab(){
             "filament_mode":    s.get("filament_mode", self._filament_mode),
             "ace_drying":       s.get("ace_drying", {"status": 0, "target_temp": 0, "duration": 0, "remain_time": 0, "humidity": None, "current_temp": None}),
             "ace_units":        list(self._ace_box_ids),
+            "ace_auto_feed":    dict(self._ace_auto_feed),
             "ace_dry_presets":  self._ace_dry_presets,
             "thumbnail":        self._thumbnail_b64,
             "connection_error": s["connection_error"],
@@ -5822,6 +5870,7 @@ def build_app(bridge: KobraXBridge) -> web.Application:
     r.add_post("/api/speed",               bridge.handle_api_speed)
     r.add_post("/api/ams/feed",            bridge.handle_api_ams_feed)
     r.add_post("/api/ams/set_slot",        bridge.handle_api_ams_set_slot)
+    r.add_post("/api/ace/auto_feed",        bridge.handle_api_ace_auto_feed)
     r.add_post("/api/ace/dry",             bridge.handle_api_ace_dry)
     r.add_post("/api/axis",                bridge.handle_api_axis)
     r.add_post("/api/temperature",         bridge.handle_api_temperature)