You are drawing 9 Amps from the battery yes, but if the lighter socket is getting hot that would indicate resistance in the connection and some portion of the current is being lost, converted to heat, before it gets to the cooler. Can you measure amps at the cooler?

Right?

Alistair

> On Aug 30, 2014, at 9:09 AM, Rocket J Squirrel <camping.elliott@GMAIL.COM> wrote:
> 
> This came up about a week ago. In theory, the 120V and 12V elements
> should While driving I had it hooked to the house battery,
> and I can tell that it was drawing plenty power because the cigar
> lighter plug got real warm -- hot almost. Shouldn't get that hot, I'm
> going to look into the thing to see if I can sort it out. The house
> battery ammeter showed about 9A of constant current draw, indicating a
> solid current path.
> 
>>