I've been using Kleenrite heaters for quite a while now. Dropped my flow a bit with new jets, but the trade off was higher impact and I could do a 15 foot row of cleaning before the heat dropped.Good heat, only problem is the disc thermostats go every year or so. I recently replaced all 4 (2 at 190, 2 at 210 ) to 2 sets at 240. It's been a week with no problems and screaming heat at 35 to 50 away from the heater. Is this gonna blow up on me?