Issue: Regarding front defoggers unable to blow out cold air
 

Hello, This is hoe from India. This will be my first issue in the forum.

I own a 2017 model Hyundai Elantra (Petrol model), having dual climate control (Separate temperature settings for driver and co-passenger).
Recently I have observed an issue in cooling system. To be more precise the front facing A/C is working fine for both the passenger and driver. However when the A/C mode is changed to the front defogger, defogger only blows hot/normal air, instead of blowing cold air (in spite of keeping the temperature at the lowest).
Since it is a dual climate control vehicle, when i switch on defogger both the sides of the front blower on dash, blows only air, instead of blowing cold air.

Any suggestions would be appreciated.

Thanks