diff --git a/examples/12-ServiceLoops/DEV_Sensors.h b/examples/12-ServiceLoops/DEV_Sensors.h
index f33b2e1..01331aa 100644
--- a/examples/12-ServiceLoops/DEV_Sensors.h
+++ b/examples/12-ServiceLoops/DEV_Sensors.h
@@ -15,7 +15,7 @@ struct DEV_TempSensor : Service::TemperatureSensor {     // A standalone Tempera
     // Though the HAP documentation includes a Characteristic that appears to allow the device to over-ride this setting by specifying a display
     // of Celsius or Fahrenheit for each Service, it does not appear to work as advertised.
     
-    temp=new Characteristic::CurrentTemperature(30.0);        // instantiate the Current Temperature Characteristic
+    temp=new Characteristic::CurrentTemperature(-10.0);        // instantiate the Current Temperature Characteristic
     temp->setRange(-50,100);                                  // expand the range from the HAP default of 0-100 to -50 to 100 to allow for negative temperatures
         
     Serial.print("Configuring Temperature Sensor");           // initialization message
@@ -70,8 +70,6 @@ struct DEV_AirQualitySensor : Service::AirQualitySensor {     // A standalone Ai
     airQuality=new Characteristic::AirQuality(1);                         // instantiate the Air Quality Characteristic and set initial value to 1
     o3Density=new Characteristic::OzoneDensity(300.0);                    // instantiate the Ozone Density Characteristic and set initial value to 300.0
     no2Density=new Characteristic::NitrogenDioxideDensity(700.0);         // instantiate the Nitrogen Dioxide Density Characteristic and set initial value to 700.0
-        new SpanRange(300,500,2);
-
     
     Serial.print("Configuring Air Quality Sensor");   // initialization message
     Serial.print("\n");
diff --git a/src/HomeSpan.cpp b/src/HomeSpan.cpp
index 9a18457..ccea28d 100644
--- a/src/HomeSpan.cpp
+++ b/src/HomeSpan.cpp
@@ -1310,6 +1310,17 @@ void SpanAccessory::validate(){
       foundProtocol=true;
     else if(aid==1)                             // this is an Accessory with aid=1, but it has more than just AccessoryInfo and HAPProtocolInformation.  So...
       homeSpan.isBridge=false;                  // ...this is not a bridge device
+
+    for(int j=0;j<Services[i]->Characteristics.size();j++){       // check that initial values are all in range of mix/max (which may have been modified by setRange)
+      SpanCharacteristic *chr=Services[i]->Characteristics[j];
+
+      if(chr->format!=STRING && (chr->uvGet<double>(chr->value) < chr->uvGet<double>(chr->minValue) || chr->uvGet<double>(chr->value) > chr->uvGet<double>(chr->maxValue))){
+        char c[256];
+        sprintf(c,"    !Warning: Initial value of %lg for %s-%d is out of range [%llg,%llg].  This may cause device to be non-reponsive!\n",
+               chr->uvGet<double>(chr->value),chr->hapName,chr->iid,chr->uvGet<double>(chr->minValue),chr->uvGet<double>(chr->maxValue));
+        homeSpan.configLog+=c;
+      }       
+    }
   }
 
   if(!foundInfo){