Lucky you! My HVAC doesn't generate anywhere near enough heat to crack a windshield. Though they do manage to crack for no reason. Had two replaced in 2 years.How about heated ‘rests’ for the windshield wipers so that they don’t ice over?
I cracked my windshield by turning the front defrost onto high fan and high heat- my go to move for keeping the wipers and the windshield ice free. SNAP- The air gets too hot frankly. My son noticed that, but I didn’t think that it would be hot enough to light off the windshield.