J Walker wrote:
I called Dometic yesterday to get more information about the possibility of the electric heater putting out too much heat and causing the weld fracture. I made some measurements of the AC current and voltage of my heater and got 360-372 watts. The tech, Roger, said that was within the acceptable range and it was not a concern. He said that the heat from the propane burner was greater than the electric heater and it would be the one to cause a weld fracture and not the electric heater for the above electric heater output. I calculated my heater resistance to be between 41.5 and 43 ohms.
The difference is the heat of the flame is evenly distributed in the boiler tube whereas the element concentrates the heat in a very small area. And Tim's pictues above simply verifies that. Personally, if the element measures less than 44 ohms then it is getting replaced. I don't trust Dometics version of what is acceptable anymore. All you have to do is read the remedy they have in mind for "fixing" the problem.
