There’s a big automotive manufacturer starts with H that had a problem in 2003 in one of their cars. The heater switch basically melted use due to the fact under gauge wire and bad design. Yes I had one of those cars, when the switch started not work I opened up the dash panel and found approximately 6 to 8 inches of wire insulation melted and also half the switch melted. I went to the dealer contacted the service manager told him what happened and yes everything was replaced under a good will gesture. Goodwill my butt, what would happen if you’re driving down the road and you dash catches on fire Would they buy you a new vehicle not. It just proves engineers being cheap and that’s how things are nowadays built sheet when in doubt the one size up.