Phil,
There is no temp booster on this model. The Deluxe model (which was a spray arm model rather than an impeller model) had it.
As you probably noticed, this is a two years old post... I got 5 other dishwashers since! This one is the first GM/Frigidaire dishwasher I had and it's also the very first GM/Frigidaire appliance I ever saw when I was a kid!
It belonged to people I know since I was a kid. I since became friend with them and I visit them quite often. One day, I asked them what had happened to their old Frigidaire dishwasher and they told me they still had it and it was stored inside a huge refrigerator in one of their farm buildings where they used to store eggs. It still took a few months before I had the chance to see it and soon after, they gave it to me!
The dishwasher was in the same condition when I was a kid back in the eighties with wood grain vinyl covering already added by it's owners to protect the lid from scratches and I didn't remove it to keep it just like it was when I first saw it about 30 years ago!