What is WHC on Airbus A320? (Window Heat Computer)

The Airbus A320 is one of the most popular aircraft in the world, known for its efficiency, reliability, and advanced technology. One crucial component of the A320 that ensures safe and comfortable flights is the Window Heat Computer (WHC). The WHC is responsible for regulating the temperature of the cockpit and cabin windows, preventing ice from forming on them and ensuring optimal visibility for pilots.

Functions and Importance of the Window Heat Computer

The Window Heat Computer performs several essential functions to ensure the proper operation of the window heating system. It continuously monitors the temperature and humidity conditions outside the aircraft, as well as the temperature inside the cockpit and cabin. Based on these measurements, the WHC automatically adjusts the power supplied to the window heating elements to maintain the windows at the optimal temperature.

The window heating system is crucial because ice formation on the windows can severely hamper visibility for pilots, posing significant safety risks. Ice accumulation can also impact the integrity of the windows, potentially leading to cracks or even shattered glass. By regulating the temperature of the windows, the WHC ensures clear visibility and prevents ice-related issues throughout the flight.

Components of the Window Heat Computer

The Window Heat Computer consists of several key components that work together to regulate the temperature of the aircraft’s windows. These components include:

  • Temperature Sensors: The WHC is equipped with temperature sensors that measure the outside temperature, cabin temperature, and cockpit temperature. These sensors provide essential data for the computer to determine the appropriate amount of power required to heat the windows.
  • Control Circuitry: The control circuitry is responsible for receiving the temperature data from the sensors and calculating the necessary power output for the window heating elements. It ensures that the windows remain at the optimal temperature at all times.
  • Power Supply: The WHC is connected to the aircraft’s electrical system and receives power to operate. It uses this power to generate the necessary heat for the window heating elements.
  • Window Heating Elements: These elements are located around the edges of the cockpit and cabin windows. They generate heat when powered by the WHC, preventing ice formation and maintaining clear visibility.

By integrating these components, the Window Heat Computer ensures that the window heating system operates seamlessly, providing optimal visibility and safety for the crew and passengers.


The Window Heat Computer plays a crucial role in maintaining the safety and performance of the Airbus A320’s window heating system. By monitoring and adjusting the power supplied to the heating elements, it prevents the formation of ice on the windows and ensures clear visibility for pilots. This advanced technology is just one of the many features that make the A320 a reliable and sought-after aircraft in commercial aviation.

To learn more about the Airbus A320 and its components, you can visit the official Airbus website here.

For More: What is FIDS on Airbus A320? (Fault Isolation And Detection System)