Thanks for the tips. I had a couple of Frigidaire dishwashers in rental units that wouldn't advance past the heat delay. With the landlord's permission, I ended up bypassing the temp boost thermostats. Both dishwashers had good heaters and water fill levels, and new thermostats didn't fix it. Do you think some thermal paste on the thermostats would fix the problem?
When you say they're using epoxy, is this on temporary valves so they leave them on permanently? Or, are they using epoxy on the braze on valve, instead of brazing it?
On the GE cooktops with the tiny screws, I don't think there's any way to get those apart without breaking them. I usually drill them all out and pop rivet them back together.