Troubleshooting-Gaggia-Brew-Blocked-Group-Valve

Only Flow From Steam Wand

Try these steps in the following order. Between each step test the machine for flow. If flow is restored to the machine do an immediate descale of the unit before returning to normal use.

1. Test the flow of the machine without the portafilter attached. If the machine flows with the portafilter removed then one of the filter baskets is blocking the flow. Clean the baskets by soaking them in a solution of hot water and backflushing powder for 30 minutes, or boiling the baskets for 30 minutes.
2. Make sure the grouphead is completely clean and free of debris. Be sure to completely disassemble and clean the grouphead according to the instructions here.
3. Do a complete boiler clean and rebuild of the machine using the instructions here.