No, the PD heat port is 3/8" OD.
Did you measure it while it was under load? If not then that 14V measurement doesn't mean much.
I'm not sure what's wrong with my car adapter or inverter. When measured it gives off a >14V voltage, but it can't get my UD as warm as a different adapter I have that only gives off 12,2V
Did you measure it while it was under load? If not then that 14V measurement doesn't mean much.