diff --git a/Thermo.Active.Core/ThreadsFunctions.cs b/Thermo.Active.Core/ThreadsFunctions.cs
index 82be3e18..0f566e47 100644
--- a/Thermo.Active.Core/ThreadsFunctions.cs
+++ b/Thermo.Active.Core/ThreadsFunctions.cs
@@ -813,7 +813,7 @@ public static class ThreadsFunctions
                 if (ncAdapter.numericalControl.NC_IsConnected())
                 {
                     // every 10 reads all data...
-                    useCache = (readCount == 0);
+                    useCache = (readCount != 0);
                     // Get new data from PLC
                     libraryError = ncAdapter.ReadWarmers(useCache, out Dictionary<int, DTOWarmers> currWarmers);
                     if (libraryError.IsError())