this thread made me nervous enough to not run the windshield defrost.. lol haven’t had a need to yet, but the hvac sometimes run it on its own so I make sure to enable feet mode
When I get my windshield replaced I'm planning to not run defrost, just run the HVAC on auto. until the windshield warms up. It'll be slower, for sure, but less expensive than replacing windshields at $2300 a pop.