Hey scotty, what if I unhook the ac and heater controls , and drive around without out it to see if…

Hey scotty, what if I unhook the ac and heater controls , and drive around without out it to see if the heat stops blowing through the defrost? If it stops blowing hot air through the defrost does that mean it's the ac and heater controls?

that's not such an accurate test, cause defrost is the default position, and most cars will blow out the defrost with everything shut off these days by design.

false