OK, look up all the issues when HOMES were built and wired with aluminum wire and NOT copper....
even with screws for connection.. FIRES... and kept building/using till the law suits stopped it..
second point.. GM and the millions of cars built with BAD ignition switches.. for almost 10 years...
So YES they do..
or the 15 plus million AIR BAGS... in cars... almost 10 years.
but to the HEAT issues..
I have a 12/3 Cord just for the electric heater... also runs the dehumidifier..
and the trailer has a 30 amp connector.. so I never planed to run camper and heater together.