The heater no longer pushes hot air. It can hardly melt the ice off the windshield in the cold snowy days here in Iowa. Moreover, if the windshield is warm and I start driving while it is snowing, the snow will start melting on the windshield and the heater will not be powerful enough to melt it. That creates an icy windshield that makes it hard to see. I am pretty sure that replacing or flushing the heating radiator will fix the issue, but both options are very difficult to do for myself and mechanic is asking for too much money.