I was aware of that, but I still need one !........I know the Legacy Powermaster replaces these, but we are presently set up with Two Loops, a TPC 300 on each loop! If I had One TPC 300 & One Legacy Powermaster , I would have to change all the wiring! It would like mixing Oranges & Apples! It would be a great Deal easier if I can find a TPC 300 to replace the defective Unit !!!
Fred