diff --git a/monitor/fan.cpp b/monitor/fan.cpp
index c5322b1..0e2d835 100644
--- a/monitor/fan.cpp
+++ b/monitor/fan.cpp
@@ -356,15 +356,15 @@
 
 bool Fan::outOfRange(const TachSensor& sensor)
 {
-    auto actual = static_cast<uint64_t>(sensor.getInput());
-    auto range = sensor.getRange(_deviation);
-
-    if ((actual < range.first) || (actual > range.second))
+    if (!sensor.hasOwner())
     {
         return true;
     }
 
-    return false;
+    auto actual = static_cast<uint64_t>(sensor.getInput());
+    auto range = sensor.getRange(_deviation);
+
+    return ((actual < range.first) || (actual > range.second));
 }
 
 void Fan::updateState(TachSensor& sensor)