My 97 Sonata`s a/c and heat has not been working corectly. when I turn the control on it only works some of the time!!!!!!! So I just leave it in the on position and it used to come on every now and then. But here lately it just won`t come on at all, its not blowing any air at all. Please if anyone knows what going on with it , please reply. Thanks

 

Is your temperature gage reading as expected? If it stays low, you may have a thermostat stuck open.

 

if it's not blowing air that means your blower motor isbad or a faulty fuse or relay. if it's blowing cold air then that's different.

 

That or the blower switch !!