I need help

Hello, very good to all.
I have a Daewoo Lanos that I bought second -hand, when they gave it to me I had a failure and that is that the hot air that the crital does not work. Nothing came out. Like the rest of the heating if I worked then I let it pass without more but yesterday my heating was spoiled. Only cold air comes out! Ice cream ...
I have read that it may be plugged, the water pump discard it that I have new and reviewed ... so I don't.
If someone can tell me something useful I would appreciate it ... and if there is any manual to disassemble the dashboard also
thanks

You must clean the hoses that bring the hot water from the engine to the heating radiator, since according to you are a used vehicle and can be capped. and at the same time verify that you get hot water otherwise verify the operation of the engine that drives the air.