by quink » Tue Jul 17, 2012 10:43 am
Priming just make sure the boiler is full, so you dont end up killing the element in the machine.
If you steam your milk, your pump isn't running so the water level in the boiler drops as you steam. If you dont prime the machine after steaming you could be left with an element thats not covered completely by water. Which could lead to a quick failure.
If you only make espresso priming shouldn't be an issue as the pump will replace any water used when you brew, so your boiler should always be full. Never hurts to check though.
Modified Rancilio Silvia, Gaggia 2600 grinder, La Pavoni Pub 1EV