Increase delay before throwing extruder fan error

Heated enclosure means that the extruder takes longer to cool.

Firmware/temperature.cpp

@@ -562,10 +562,10 @@ void checkFanSpeed()
 	uint8_t max_extruder_fan_errors = 0;
 #ifdef FAN_SOFT_PWM
 	max_print_fan_errors = 3; //15 seconds
-	max_extruder_fan_errors = 2; //10seconds
+	max_extruder_fan_errors = 4; //20seconds
 #else //FAN_SOFT_PWM
 	max_print_fan_errors = 15; //15 seconds
-	max_extruder_fan_errors = 5; //5 seconds
+	max_extruder_fan_errors = 10; //10 seconds
 #endif //FAN_SOFT_PWM
   
   if(fans_check_enabled != false)