increased PID range even more MarlinFirmware#2

Marlin/Configuration.h

@@ -801,7 +801,7 @@
 #if ANY(PIDTEMP, PIDTEMPBED, PIDTEMPCHAMBER)
   //#define PID_OPENLOOP          // Puts PID in open loop. M104/M140 sets the output power from 0 to PID_MAX
   //#define SLOW_PWM_HEATERS      // PWM with very low frequency (roughly 0.125Hz=8s) and minimum state time of approximately 1s useful for heaters driven by a relay
-  #define PID_FUNCTIONAL_RANGE 20 // If the temperature difference between the target temperature and the actual temperature
+  #define PID_FUNCTIONAL_RANGE 40 // If the temperature difference between the target temperature and the actual temperature
                                   // is more than PID_FUNCTIONAL_RANGE then the PID will be shut off and the heater will be set to min/max.
 
   #define PID_EDIT_MENU         // Add PID editing to the "Advanced Settings" menu. (~700 bytes of flash)