Pregunta de redondeo de Arduino

He fabricado un termostato simple para controlar un calentador de 12V. El rango de temperatura puede ser de 0 F a alrededor de 190 F. Por alguna razón, cuando la temperatura mostrada en mi LCD pasa de 99 a 100, todo está bien, pero si baja de 100 a 99, el valor termina en 990. Creo que Esto es algo que ver con el redondeo en mi cálculo de temperatura del termistor. ¿Alguna idea? Código publicado abajo.

 /*
    The circuit:
 * 5V to Arduino 5V pin
 * GND to Arduino GND pin
 * CLK to Analog #5
 * DAT to Analog #4
 * BUTTON to Analog #2
 * Thermistor to Analog #3
 * Heater to digital #7
*/

// include the library code:
#include <Wire.h>
#include <LiquidCrystal.h>
#include "OneButton.h"
#include <EEPROM.h>

LiquidCrystal lcd(0);
int heater = 7;       // heater is connected to pin 2
OneButton button(A2, true);
float settemp;
unsigned long currentTime;
unsigned long loopTime;

void setup()
{
  currentTime = millis();
  loopTime = currentTime;
  EEPROM.read (1); // make the eeprom or atmega328 memory address 1
  Serial.begin(9600);
  // link the doubleclick function to be called on a doubleclick event.   
  button.attachDoubleClick(doubleclick);
  button.attachClick(click);
  pinMode(heater, OUTPUT);                       // Set the Heater Valve pin as output
  lcd.begin(16,2);
  delay(1000);
  lcd.setBacklight(HIGH);
  delay(1000);
  lcd.setCursor(0,0);
    lcd.print("  D.W. VEGGIE");
  lcd.setCursor(0,1);
    lcd.print(" BURNER SYSTEMS");
  delay(4000);
  lcd.clear();
  delay(1000);
  lcd.setCursor(0,0);
    lcd.print("  CENTRITHERM");
  lcd.setCursor(0,1);
    lcd.print("     V1.0");  
  delay(4000);
  lcd.clear();
  delay(1000);
  lcd.setCursor(0,0);
    lcd.print("SET TEMP     F   ");
  lcd.setCursor(0,1);
    lcd.print("OIL TEMP     F   ");  
}

double Thermister2(int RawADC) {
  double Temp2;
  Temp2 = log(((10240000/RawADC) - 10000));
  Temp2 = 1 / (0.001129148 + (0.000234125 * Temp2) + (0.0000000876741 * Temp2 * Temp2 * Temp2));
  Temp2 = Temp2 - 273.15;           // Convert Kelvin to Celcius
  Temp2 = (Temp2 * 1.8) + 32;    // Convert to F
  Temp2 = round(Temp2);
  return Temp2;
}

void loop()
{
  currentTime = millis();
  settemp = EEPROM.read(1); // read the settemp on the eeprom
  button.tick();
  if(currentTime >= (loopTime + 500)){ 
    double Temp2 = Thermister2(analogRead(1));   // read Thermistor
    if (Temp2 < settemp) digitalWrite(heater, HIGH);      // turn heater on 
        else if (Temp2 >= settemp) digitalWrite(heater, LOW);  // turn heater off 
    lcd.setCursor(9,1);
    lcd.print(Temp2,0);
    loopTime = currentTime;
  }
  lcd.setCursor(9,0);
    lcd.print(settemp,0);
  EEPROM.write (1,settemp);  
  delay(10);
}

// this function will be called when the button was pressed 2 times in a short timeframe.
void doubleclick() {
   settemp --  // remove one to the settemp, the settemp is the ideal temperature for you
   ;
} // doubleclick

// this function will be called when the button was pressed 1 time in a short timeframe.
void click() {
  (settemp ++);  // add one to the settemp, the settemp is the ideal temperature for you
} // click
// End