2000 ECM Giotto from cold start, pressure/temp builds but ...

Equipment doesn't work? Troubleshooting? If you're handy, members can help.
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Joined: 5 months ago

#1: Post by wolfdown »

My 2000 ECM Giotto started behaving oddly.
From a cold start, pressure gauge indicates appropriate pressure, group head heats up well.
But as soon as i open the steam wand the pressure drops to zero and the boiler comes back on. I wait until pressure appropriate and repeat. The process continues with the pressure building and me then dropping it (a little less each time) with the wand valve ... i have to do this 3-4 times to get to a place where opening the steam wand releases steam without a dramatic drop in boiler pressure.

Thoughts? It used to operate that from a cold start, if the pressure was right and the head was hot ... I was ready to go. No longer.
Any ideas on what might be causing this behaviour?

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#2: Post by stefano65 »

Check the anti-vacuum valve first
Stefano Cremonesi
Stefano's Espresso Care
Repairs & sales from Oregon.

wolfdown (original poster)
Posts: 7
Joined: 5 months ago

#3: Post by wolfdown (original poster) »

Much appreciated. Was stuck open/up.