diff --git a/apps/web/src/components/panels/PropertiesPanel.tsx b/apps/web/src/components/panels/PropertiesPanel.tsx
index 80ce19c..c8cebf6 100644
--- a/apps/web/src/components/panels/PropertiesPanel.tsx
+++ b/apps/web/src/components/panels/PropertiesPanel.tsx
@@ -43,6 +43,7 @@ import {
   calibrateAdjacentActuatorPatches,
   collectCalibHints,
   isCalibRelevantNode,
+  setupTripleCycleCalibPatches,
   withDerivedUaEff,
 } from "@/lib/calibAssist";
 import { ComponentIcon } from "@/components/canvas/ComponentIcon";
@@ -161,6 +162,11 @@ export default function PropertiesPanel() {
     return calibrateAdjacentActuatorPatches(node, nodes, edges);
   }, [node, nodes, edges]);
 
+  const tripleCalibPatches = useMemo(
+    () => setupTripleCycleCalibPatches(nodes, edges),
+    [nodes, edges],
+  );
+
   // After a successful solve, jump to Results when selecting a part (Dymola-like).
   useEffect(() => {
     if (!node) return;
@@ -345,20 +351,37 @@ export default function PropertiesPanel() {
                 {h.message}
               </p>
             ))}
-            {calibActuatorPatches.length > 0 && (
-              <button
-                type="button"
-                className="mt-0.5 rounded border border-sky-600 bg-white px-2 py-1 text-[10px] font-medium text-sky-800 hover:bg-sky-100"
-                onClick={() => {
-                  const map = new Map(
-                    calibActuatorPatches.map((p) => [p.nodeId, p.params]),
-                  );
-                  updateNodesParams(map);
-                }}
-              >
-                Libérer facteurs compatibles (Free)
-              </button>
-            )}
+            <div className="flex flex-wrap gap-1 pt-0.5">
+              {tripleCalibPatches.length > 0 && (
+                <button
+                  type="button"
+                  className="rounded border border-sky-700 bg-sky-700 px-2 py-1 text-[10px] font-medium text-white hover:bg-sky-800"
+                  title="probe_1 Tsat→evap z_ua · probe_2 T→f_w · probe_2 Tsat→cond z_ua"
+                  onClick={() => {
+                    const map = new Map(
+                      tripleCalibPatches.map((p) => [p.nodeId, p.params]),
+                    );
+                    updateNodesParams(map);
+                  }}
+                >
+                  Configurer f_w + z_ua evap/cond
+                </button>
+              )}
+              {calibActuatorPatches.length > 0 && (
+                <button
+                  type="button"
+                  className="rounded border border-sky-600 bg-white px-2 py-1 text-[10px] font-medium text-sky-800 hover:bg-sky-100"
+                  onClick={() => {
+                    const map = new Map(
+                      calibActuatorPatches.map((p) => [p.nodeId, p.params]),
+                    );
+                    updateNodesParams(map);
+                  }}
+                >
+                  Libérer facteurs compatibles (Free)
+                </button>
+              )}
+            </div>
           </div>
         )}
 
diff --git a/apps/web/src/lib/calibAssist.test.ts b/apps/web/src/lib/calibAssist.test.ts
index 36e5374..f195957 100644
--- a/apps/web/src/lib/calibAssist.test.ts
+++ b/apps/web/src/lib/calibAssist.test.ts
@@ -5,6 +5,7 @@ import {
   adjacentProbeNames,
   calibrateAdjacentActuatorPatches,
   collectCalibHints,
+  setupTripleCycleCalibPatches,
   withDerivedUaEff,
   type CalibNodeData,
 } from "./calibAssist";
@@ -203,6 +204,41 @@ describe("calibAssist — Fixed/Free générique", () => {
     expect(collectCalibHints([hx], [], hx).some((h) => h.level === "tip")).toBe(true);
   });
 
+  it("setupTripleCycleCalibPatches wires SST/SDT/DGT to z_ua/f_w", () => {
+    const nodes = [
+      node("e", "FloodedEvaporator", "evap", { ua: 9000, z_ua: 1 }),
+      node("p1", "Probe", "probe_1", { tsat_c: 4.4 }),
+      node("c", "IsentropicCompressor", "comp", { f_w: 1, z_flow: 1 }),
+      node("p2", "Probe", "probe_2", {
+        t_c: 44,
+        tsat_c: 36,
+        p_bar: 5,
+        x: 1,
+        [fixedFlagKey("p_bar")]: true,
+        [fixedFlagKey("x")]: true,
+      }),
+      node("d", "Condenser", "cond", { ua: 2200, z_ua: 1 }),
+    ];
+    const edges: Edge[] = [
+      { id: "e1", source: "e", target: "p1" },
+      { id: "e2", source: "p1", target: "c" },
+      { id: "e3", source: "c", target: "p2" },
+      { id: "e4", source: "p2", target: "d" },
+    ];
+    const patches = setupTripleCycleCalibPatches(nodes, edges);
+    expect(patches.length).toBe(5);
+    const byId = Object.fromEntries(patches.map((p) => [p.nodeId, p.params]));
+    expect(byId.p1[fixedFlagKey("tsat_c")]).toBe(true);
+    expect(byId.p2[fixedFlagKey("t_c")]).toBe(true);
+    expect(byId.p2[fixedFlagKey("tsat_c")]).toBe(true);
+    expect(byId.p2[fixedFlagKey("p_bar")]).toBe(false);
+    expect(byId.p2[fixedFlagKey("x")]).toBe(false);
+    expect(byId.e[fixedFlagKey("z_ua")]).toBe(false);
+    expect(byId.d[fixedFlagKey("z_ua")]).toBe(false);
+    expect(byId.c[fixedFlagKey("f_w")]).toBe(false);
+    expect(byId.c.f_w).toBe(0.95);
+  });
+
   it("appends derived UA_eff = UA × z_ua", () => {
     const nodes = [node("e", "Evaporator", "evap", { ua: 8000, z_ua: 1 })];
     const solved: SolvedVariable[] = [
diff --git a/apps/web/src/lib/calibAssist.ts b/apps/web/src/lib/calibAssist.ts
index d262890..ac31c6c 100644
--- a/apps/web/src/lib/calibAssist.ts
+++ b/apps/web/src/lib/calibAssist.ts
@@ -207,6 +207,53 @@ export function collectCalibHints(
       }
     }
 
+    // Orphan Fixed measures (no compatible factor, or no Free partner) confuse DoF.
+    if (focus.data.type === "Probe") {
+      for (const m of fixedProbeMeasures(focus)) {
+        if (m.factors.length === 0) {
+          hints.push({
+            level: "warn",
+            component: focus.data.name,
+            message:
+              `${m.label} Fixed n’a pas de facteur compatible — décoche Fixed ` +
+              `(ex. X/titre ne calibre rien).`,
+          });
+          continue;
+        }
+        const neigh = adjacentNodes(focus, nodes, edges).filter((n) => n.data.type !== "Probe");
+        const hasPartner = neigh.some((n) =>
+          actuatorParams(n.data.type).some(
+            (ap) => ap.actuatorFactor && m.factors.includes(ap.actuatorFactor),
+          ),
+        );
+        if (!hasPartner) {
+          hints.push({
+            level: "warn",
+            component: focus.data.name,
+            message:
+              `${m.label} Fixed sans composant adjacent avec ${m.factors.join("/")} — ` +
+              `décoche Fixed ou place la Probe sur le bon fil.`,
+          });
+        } else if (m.kind === "P") {
+          const zDpFree = neigh.some((n) =>
+            actuatorParams(n.data.type).some(
+              (ap) =>
+                ap.actuatorFactor === "z_dp" && !isParamFixed(n.data.params ?? {}, ap),
+            ),
+          );
+          if (!zDpFree) {
+            hints.push({
+              level: "warn",
+              component: focus.data.name,
+              message:
+                `P Fixed sans z_dp Free adjacent — décoche P (sinon Jacobien / DoF confus). ` +
+                `Pour ΔP : Free z_dp sur le HX.`,
+            });
+          }
+        }
+      }
+    }
+
     // Baseline always visible — otherwise users see nothing when all Fixed (default).
     if (hints.length === 0 && isCalibRelevantNode(focus)) {
       if (focus.data.type === "Probe") {
@@ -216,9 +263,9 @@ export function collectCalibHints(
             level: "tip",
             component: focus.data.name,
             message:
-              "Fixed/Free : coche Fixed sur une mesure (Tsat, P, T, Capacity…) " +
-              "puis libère le facteur compatible sur le composant adjacent " +
-              "(z_ua, z_dp, z_flow, f_w).",
+              "Calib cycle : probe aspiration → Fixed Tsat (SST) + Free z_ua évap ; " +
+              "probe refoulement → Fixed T (DGT) + Free f_w, Fixed Tsat (SDT) + Free z_ua cond. " +
+              "Ne coche pas P ni X.",
           });
         }
       } else {
@@ -301,6 +348,84 @@ export function calibrateAdjacentZUaPatch(
   return zUa ?? patches[0] ?? null;
 }
 
+/**
+ * One-click DoF for a standard chiller/HP cycle:
+ *   probe suction  → Fixed Tsat → Free evap z_ua
+ *   probe discharge → Fixed T + Fixed Tsat → Free comp f_w + Free cond z_ua
+ * Unfixes orphan P/X on those probes.
+ */
+export function setupTripleCycleCalibPatches(
+  nodes: Node<CalibNodeData>[],
+  edges: Edge[],
+): CalibParamPatch[] {
+  const probes = nodes.filter((n) => n.data.type === "Probe");
+  let suction: Node<CalibNodeData> | undefined;
+  let discharge: Node<CalibNodeData> | undefined;
+  let evap: Node<CalibNodeData> | undefined;
+  let cond: Node<CalibNodeData> | undefined;
+  let comp: Node<CalibNodeData> | undefined;
+
+  for (const n of nodes) {
+    const t = n.data.type;
+    if (!evap && t.includes("Evaporator")) evap = n;
+    if (!cond && t.includes("Condenser")) cond = n;
+    if (!comp && t.includes("Compressor")) comp = n;
+  }
+
+  for (const p of probes) {
+    const adj = adjacentNodes(p, nodes, edges);
+    const nearComp = adj.some((a) => a.data.type.includes("Compressor"));
+    const nearEvap = adj.some((a) => a.data.type.includes("Evaporator"));
+    const nearCond = adj.some((a) => a.data.type.includes("Condenser"));
+    if (nearComp && nearEvap) suction = p;
+    if (nearComp && nearCond) discharge = p;
+  }
+
+  if (!suction || !discharge || !evap || !cond || !comp) return [];
+
+  const patches: CalibParamPatch[] = [];
+
+  const suctionParams = { ...(suction.data.params ?? {}) };
+  suctionParams[fixedFlagKey("tsat_c")] = true;
+  suctionParams[fixedFlagKey("t_c")] = false;
+  suctionParams[fixedFlagKey("p_bar")] = false;
+  suctionParams[fixedFlagKey("x")] = false;
+  suctionParams[fixedFlagKey("tsh_k")] = false;
+  suctionParams[fixedFlagKey("capacity_w")] = false;
+  if (suctionParams.tsat_c === undefined) suctionParams.tsat_c = 4.4;
+  patches.push({ nodeId: suction.id, params: suctionParams });
+
+  const dischargeParams = { ...(discharge.data.params ?? {}) };
+  dischargeParams[fixedFlagKey("t_c")] = true;
+  dischargeParams[fixedFlagKey("tsat_c")] = true;
+  dischargeParams[fixedFlagKey("p_bar")] = false;
+  dischargeParams[fixedFlagKey("x")] = false;
+  dischargeParams[fixedFlagKey("tsh_k")] = false;
+  dischargeParams[fixedFlagKey("capacity_w")] = false;
+  if (dischargeParams.t_c === undefined) dischargeParams.t_c = 44;
+  if (dischargeParams.tsat_c === undefined) dischargeParams.tsat_c = 36;
+  patches.push({ nodeId: discharge.id, params: dischargeParams });
+
+  const evapParams = { ...(evap.data.params ?? {}) };
+  evapParams[fixedFlagKey("z_ua")] = false;
+  if (typeof evapParams.z_ua !== "number") evapParams.z_ua = 1.0;
+  patches.push({ nodeId: evap.id, params: evapParams });
+
+  const condParams = { ...(cond.data.params ?? {}) };
+  condParams[fixedFlagKey("z_ua")] = false;
+  condParams[fixedFlagKey("z_dp")] = true;
+  if (typeof condParams.z_ua !== "number") condParams.z_ua = 1.0;
+  patches.push({ nodeId: cond.id, params: condParams });
+
+  const compParams = { ...(comp.data.params ?? {}) };
+  compParams[fixedFlagKey("f_w")] = false;
+  compParams[fixedFlagKey("z_flow")] = true;
+  compParams.f_w = 0.95;
+  patches.push({ nodeId: comp.id, params: compParams });
+
+  return patches;
+}
+
 /**
  * Append derived UA_eff = UA × z_ua when both are known after solve.
  */
diff --git a/apps/web/src/lib/componentMeta.ts b/apps/web/src/lib/componentMeta.ts
index fa61c28..2d35048 100644
--- a/apps/web/src/lib/componentMeta.ts
+++ b/apps/web/src/lib/componentMeta.ts
@@ -531,17 +531,17 @@ export const COMPONENTS: ComponentMeta[] = [
         key: "f_w",
         label: "f_w (rétention énergie)",
         kind: "number",
-        default: 1.0,
+        default: 0.95,
         min: 0,
         max: 1,
         section: "Calibration",
         fixable: true,
         defaultFixed: true,
         actuatorFactor: "f_w",
-        freeMin: 0.0,
+        freeMin: 0.5,
         freeMax: 1.0,
         description:
-          "Fraction du travail conservée dans le fluide : 1 = adiabatique, 0.98 ≈ 2 % perdu, 0 = tout perdu. Fixed OFF + Probe T (DGT) sur refoulement.",
+          "Fraction du travail conservée dans le fluide : 1 = adiabatique, 0.95 ≈ 5 % perdu. Fixed OFF + Probe T (DGT) sur refoulement. Ne pas partir à 1.0 (borne).",
       },
     ],
   },
diff --git a/apps/web/src/lib/configBuilder.ts b/apps/web/src/lib/configBuilder.ts
index 7fe99b0..8a12e82 100644
--- a/apps/web/src/lib/configBuilder.ts
+++ b/apps/web/src/lib/configBuilder.ts
@@ -611,9 +611,12 @@ export function buildModelEmbeddings(
 
       if (p.actuatorFactor && !fixed) {
         const n = typeof raw === "number" ? raw : Number(raw);
-        // Keep the UI value as Newton start (do not rewrite 1.0 → 0.3 — that
-        // pushed Free Z into a fragile basin and amplified HashMap-order flakes).
-        const initial = Number.isFinite(n) ? n : 1.0;
+        // Keep the UI value as Newton start. For f_w, avoid the upper bound 1.0
+        // (adiabatic) which saturates the unknown and can singularize J.
+        let initial = Number.isFinite(n) ? n : (p.default as number) ?? 1.0;
+        if (p.actuatorFactor === "f_w" && Math.abs(initial - 1.0) < 1e-12) {
+          initial = 0.95;
+        }
         freeActs.push({
           factor: p.actuatorFactor,
           initial,