diff --git a/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts b/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
index 3aae3dc6..25006242 100644
--- a/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
+++ b/src/test/domain/work-orders/mappers/work-order-board-patch-mapper.test.ts
@@ -70,6 +70,9 @@ describe("expandTablePatchToBoardFieldOps", () => {
     expect(expandTablePatchToBoardFieldOps({ severity: null })).toEqual([
       { field: "severity", value: "" },
     ]);
+    expect(expandTablePatchToBoardFieldOps({ apptTime: "" })).toEqual([
+      { field: "apptTime", value: "" },
+    ]);
   });
 
   it("emits service notes modal ops in pm → extraServices → serviceNotes order", () => {
diff --git a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
index 68b694fe..eed8dbce 100644
--- a/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
+++ b/src/test/domain/work-orders/use-cases/use-work-order-table-mutations.test.tsx
@@ -537,3 +537,63 @@ describe("useWorkOrderTableMutations patchField success callbacks", () => {
     await waitFor(() => expect(onSuccessFirst).toHaveBeenCalledTimes(1));
   });
 });
+
+describe("useWorkOrderTableMutations apptTime clear", () => {
+  it("patches empty apptTime and keeps the appointment date on refetch", async () => {
+    const datedRow: WorkOrderTableRow = {
+      ...BASE_ROW,
+      scheduledOn: "2026-06-25",
+      apptStart: "09:00",
+      apptEnd: "11:00",
+      apptTime: "09:00 – 11:00",
+      vendorId: "7",
+      primaryDispatchId: 10,
+      dispatchRowVersion: "disp-v1",
+    };
+    const clearedRow: WorkOrderTableRow = {
+      ...datedRow,
+      apptStart: "",
+      apptEnd: "",
+      apptTime: "",
+      rowVersion: "wo-v2",
+    };
+    patchBoardField.mockReset();
+    patchBoardField.mockResolvedValue(clearedRow);
+
+    const onPatch = vi.fn();
+    const { result } = renderHook(
+      () =>
+        useWorkOrderTableMutations({
+          onPatch,
+          clearPatch: () => undefined,
+          getRow: () => datedRow,
+        }),
+      { wrapper: makeWrapper() },
+    );
+
+    act(() => {
+      result.current.patchField(42, { apptTime: "" });
+    });
+
+    await waitFor(() =>
+      expect(onPatch).toHaveBeenCalledWith(
+        42,
+        expect.objectContaining({
+          apptTime: "",
+          scheduledOn: "2026-06-25",
+        }),
+      ),
+    );
+
+    expect(patchBoardField).toHaveBeenCalledWith(
+      42,
+      expect.objectContaining({
+        field: "apptTime",
+        value: "",
+        workOrderVersion: "AAAAAAA=",
+        dispatchVersion: "disp-v1",
+        primaryDispatchId: 10,
+      }),
+    );
+  });
+});