DS18B20 doesn't work with pinMode for other devices

Question

i do some project. There is DS18B20, 3 mosfet modules, 1 relay, display 1602, buzzer... I built it on bread board, everything worked. Now i soldered it: arduino works, display works but DS18B20 doesn't return temperature.

I tried to solder thermometer over again - no result. Then i glanced at my sketch and tried to remove some code in loop and setup. I understood that DS18B20 works only if in setup function no pinMode(...) for other modules. It's odd!

This is part of my code:

#include <EncButton.h>     // For buttons
#include <microDS18B20.h>  // For thermometer DS18b20
#include <EEPROM.h>        // For EEPROM memory to save settings
#include <ezBuzzer.h>      // For buzzer
#include "Screen.h"
/* --- PINS --- */
#define kettle_relay_pin 4     // Relay of kettle
#define mixer_pin 5            // Mixer pin
#define termometer_pin A2      // Termometer pin
#define hot_pump_pin A0        // Hot water
#define sugar_dispenser_pin A1 // Sugar dispenser
#define buzzer_pin 9           // Buzzer pin
#define l_button_pin 11      // Left button
#define r_button_pin 12      // Right button
#define potent_pin A3        // Potentiometer pin for set int values
/* --- PINS --- */
#define INIT_ADDR 1023  // EEPROM addres for init key
#define INIT_KEY 1      // EEPROM init key
/* --- Initialize objects --- */
// Connect thermometer DS18b20
MicroDS18B20<termometer_pin> ds;
ezBuzzer buzzer(buzzer_pin); // create ezBuzzer object that attach to a pin;
// Buttons
EncButton<EB_TICK, l_button_pin> l_button; 
EncButton<EB_TICK, r_button_pin> r_button;
// LCD Display
#define _LCD_TYPE 1
#include <LCD_1602_RUS_ALL.h>
LCD_1602_RUS lcd(0x27, 16, 2);
Screen screen(&lcd); // Create screen object instance for convient work with lcd display
/* --- Initialize objects --- */
/* --- Initial values --- */
enum modes {
  // ...
};
modes currentMode = normalMode;
// Default settings
struct Settings{
   //...
} settings;
// Current values
int current_temp = 25; // Current temperature
// ...
/* --- Initial values --- */
void setup()
{
    Serial.begin(9600);
// Buttons and potentiometer
r_button.setButtonLevel(HIGH);
l_button.setButtonLevel(HIGH);
pinMode(potent_pin, INPUT);

// Kettle
pinMode(kettle_relay_pin, OUTPUT);
digitalWrite(kettle_relay_pin, LOW);

// Pump
pinMode(hot_pump_pin, OUTPUT);
digitalWrite(hot_pump_pin, LOW);

// Mixer
pinMode(mixer_pin, OUTPUT);
digitalWrite(mixer_pin, LOW);

// Sugar dispenser motor
pinMode(sugar_dispenser_pin, OUTPUT);
digitalWrite(sugar_dispenser_pin, LOW);

// Buzzer
pinMode(buzzer_pin, OUTPUT);

// Init EEPROM
if (EEPROM.read(INIT_ADDR) != INIT_KEY) {
    // EEPROM haven't been initialized yet
    EEPROM.write(INIT_ADDR, INIT_KEY); // Write init key
    EEPROM.put(0, settings); // Set default data
}

// Read settings and apply it
EEPROM.get(0, settings);
tea_temp = settings.tea_temp_default;       
sugar_count = settings.sugar_count_default; 
settings.mixer_time = 15 * 1000;

// Init display
screen.init();

}
unsigned long screenUpdateTimer = 0;
void loop() {
  buzzer.loop();
l_button.tick();
  r_button.tick();
creen.render(); // Always render information on display
Serial.println(ds.online()); // TRUE
// For ds18b20 tests
  ds.requestTemp();
  delay(1000);
  if (ds.readTemp()) Serial.println(ds.getTemp());
  else Serial.println("error");
menuControl();
}

What's problem?

If i comment all pinMode and digitalWrite code, ds.readTemp works, else it's error.

UPDATE #1 I figured out that if i use ports A0 and A1, i get message "error" for this sketch:

#include <microDS18B20.h>
MicroDS18B20<A2> sensor;
void setup() {
  Serial.begin(9600);
}
void loop() {
  sensor.requestTemp();
delay(1000);
if (sensor.readTemp()) Serial.println(sensor.getTemp());
  else Serial.println("error");
}

And more. I get this message "error" every time without any connected modules. After some connects and disconnects of mosfet module to pins A0, A1, D5, D6. No temperature at all!

Update #2 I think it's died.

My main sketch (it worked yesterday) now doesn't work at all. But then i try some reboots and it works but not properly... So, if it works, i can see my menu on display but it's ierogliphs sometimes. also sometimes buttons stop to work...

Is aruino dead?