The first thing I would check is to make sure that lint filter in the dryer is cleaned out. The next would be to make sure that the dryer vent to the outside is clear. If it is clogged, the air flow...
Could be a number of things, when was the last time you had the car serviced for regular maintenence coolant flush, or it could ba a bad heater core aswell. Either way I suggest you have a technician...
I assume this is the Climate control heater three things can make it not work correctly, 1) your engine coolant system's thermostat has either been removed or it is bad and stuck in the fully open...
Here are a few possibilities: engine cooling fan not working. low radiator fluid. plugged radiator fins (not enough airflow through radiator). blocked or collapsed coolant hose. faulty engine...