not work on hot mod for long time

This devise has broken body. I tried to control the certain temperature in hot mode but it not stay remain at that temperature and automatically shift certainly to the cold mode and start to throw the cold blow of air.

To maintain the temperature I tried different temperature option by run it low and high temperature but it did not work.

Even I do not have its remote control so I can not control it by remote. At the medium temperature it was run for some more time but it not stay on that mode.

On the start the display shows the certain temperature and when it throw cold blow (turn the mode) it shows the "H2" on the display and the bouton will not gave any response in that mode I have to turn it off from the switch board.