[macojoe]

Make sure the T stats are in the right way! I have seen people put some in backwards and they can't work right! Can't do it with all but some you can, worth a try.
Are you sure the T stas are opening?? take out and put in boiling water see if they open and close when they get cool? Might need new ones?
Motor water pump, mine had the impeller rot off it and could not move the water, someone had put a auto water pump on it.