At 100 degrees ambient the needle should be running a little better than halfway through the range on the guage. Take the fairing inserts off the bike and look for the wires that come out of the back of the temp guage. They may not be hooked up. In that heat the fan should run for a short bit after you turn it off.
While you have the inserts off, the radiator cap is under the insert on the left side.
The seat, the seat lock is above the left passenger peg. Insert the key, turn it and the seat should pop up.
I have also done some dealing with Team Triumph. Todd is a great guy.
Team Triumph
Other places I have had good luck getting parts is SouthBay Triumph and GreatBay Triumph.
SouthBay