Arduino code for electric water pump conversion

/*
 * Tercel SR5 Wagon Water Pump Conversion
 * Jan 6, 2021
 * Completed Jan 24, 2021
 */

// Load essential libs
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Declare data wire from temp sensor to D4 pin
#define ONE_WIRE_BUS 4

// OneWire instance setup
OneWire oneWire(ONE_WIRE_BUS);

// Pass reference to temp sensor
DallasTemperature sensors(&oneWire);

// Declare display res, type, and data format
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET 4 
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

// Displays logo
#define LOGO_HEIGHT 16
#define LOGO_WIDTH 16

// define pins for pump and fan
const int pumpRelayPin = 13;
const int fanRelayPin = 12;

void setup() 
{
  Serial.begin(9600);

  //Starts temp sensor lib
  sensors.begin();

  //Generates display voltage from 3.3v internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C))
  {
    Serial.println(F("SSD1306 ALLOCATION FAILED"));
    for(;;);  
  }

  //Display initial display buffer and setup for text draw in void loop()
  display.display();
  display.clearDisplay();
  display.drawPixel(10, 10, SSD1306_WHITE);
  display.display();
  display.clearDisplay();
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.setCursor(20, 30);

  pinMode(fanRelayPin, OUTPUT); //pin 12 is fan relay
  pinMode(pumpRelayPin, OUTPUT); //pin 13 is pump relay
}

void loop()
{
  digitalWrite(pumpRelayPin, LOW); // turn on pump
  
  sensors.requestTemperatures();
  double currentTemp = sensors.getTempCByIndex(0);

  if (currentTemp > 100)
  {
    display.setCursor(10, 30);
    display.setTextSize(3);
    display.print(currentTemp);
  }

  else if (currentTemp < 99.99)
  {
    display.setCursor(20, 30);
    display.setTextSize(3);
    display.print(currentTemp);
  }

  if (currentTemp > 90.00) // turn rad fan on above given temp
  {
    display.setCursor(20, 0);
    display.setTextSize(1);
    display.print("FAN STATE: ON");
    digitalWrite(fanRelayPin, LOW);
    digitalWrite(pumpRelayPin, LOW);
  }

  else if (currentTemp < 89.99) // turn rad fan off below given temp
  {
    display.setCursor(20, 0);
    display.setTextSize(1);
    display.print("FAN STATE: OFF");
    digitalWrite(fanRelayPin, HIGH);
    digitalWrite(pumpRelayPin, LOW);
  }

  display.display();
  display.clearDisplay();
}