Gary,
Tried what you have said. Run water through the filter after I have finished making the coffee. You are right. It cools the machine down to 'the ideal temperature for making coffee' - 98 c, and as you say no more steam / pressure build up. Have never had a problem since I have started...
I have a Delonghi EC-410 Espresso Machine. I am happy with the quality of the coffee it produces, but for me, it has one major problem. I put the coffee in the filter holder, tampe it, place the filter holder on the machine, run water to get my coffee / syrup. Turn the nozzle to the steamer...