If the pump in your Gaggia Classic pro is making a loud rattling sound but no water is flowing through the group head or steam wand, it's possible all you need to do is force prime the pump. This article will show you how to prime the pump: How to Force Prime the pump.
If you want to do a real flow test this article will assist: Gaggia Classic Flow Test
If you determine that you want to replace the pump, the video below will walk you step-by-step through the process of diagnosing and replacing the pump on a Gaggia Classic Pro and Evo Pro.
The older style Gaggia Classic video is at the bottom of this article.
Gaggia Classic Pro: How to Diagnose and Replace the Pump
Failure of normal wear and tear items such as group gaskets, seals and shower screens are not covered under warranty. Issues due to scale build up or lack of maintenance are not covered.
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