What is the reason for this problem?

I have a peugeot 206+ vehicle, the windows did not appear today, I opened the boiler from 2 inside, then I bought it at 4, the smell of burns started to come on quickly, and the heater did not work with a growling voice. I wonder if he made a short circuit

get past, remove the front panel, if you have a disposable button, the buttons may be short-circuited due to oxidation, the plastic may have already melted the insides

okay teacher thank you