Bosch coffee machine not pumping water through, any ideas?
My Bosch coffee machine (Tassimo Finesse), nearly 2 years old — the pump runs but no water, or barely a trickle, comes out of the spout. Would really appreciate any advice before I fork out for a callout.
1 Answer
If the pump is running but you’re only getting a dribble or no flow, the usual causes are an airlock, blockage, scale, or a failing pump/valve. Before paying for a callout, I’d check these first.
1. **Confirm the basics** - Make sure the tank is seated properly and the outlet valve at the bottom of the tank is opening. - Check the tank filter/pick-up area for debris or limescale. - Try with the water tank freshly filled and refitted firmly.
2. **Run a cleaning/rinse cycle** - Use the service/cleaning disc if you still have it. - Run several rinse cycles to see whether flow improves. Sometimes a machine that’s stood unused gets partially airlocked.
3. **Check for an airlock** - Remove and refit the tank a few times, then try another rinse cycle. - On some coffee machines, gently encouraging water into the intake path can help, but don’t force anything or introduce water into electrical parts.
4. **Look for scale/blockage** - If descaling is overdue, carry out a proper descale using a suitable coffee machine descaler, then rinse thoroughly. - Also inspect the piercing area, spout, and any removable outlet parts for coffee residue or scale.
5. **Listen to the pump** - A loud buzzing with no flow often points to air or no water reaching the pump. - A weaker or strained sound can suggest a worn pump or blockage internally.
6. **If still no better** - That starts to point more towards an internal valve, flow path blockage, or failing pump, which would need strip-down diagnosis.
Isolate the appliance from the mains before inspecting any internal parts. If it needs internal electrical testing or dismantling beyond basic cleaning, it’s best handled by a qualified engineer.
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