Bosch Coffee Machine ERROR 3 Error: Water Pump Malfunction
What Does Bosch Coffee Machine Error 3 Mean? Error 3 indicates the water pump cannot deliver water. Check that the water tank is full and properly seated. Run several hot water cycles to clear air locks. If the pump still can’t deliver water, it may need professional replacement.
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Running the pump dry for extended periods can damage it. Fill the tank and prime before trying again.
Can I reset the code?
Yes. Refilling and priming usually resolves air lock. A failed pump needs replacement.
When to stop immediately?
Stop if you notice: Pump continues to run dry with full tank, Pump makes grinding noise.
Symptoms You May Notice
Loud pump noise but no water
The pump makes a strained, loud buzzing noise but no water comes out.
No coffee or steam output
Nothing comes from the coffee spout or steam wand despite the pump running.
Possible Causes
Empty water tank
The water tank is empty or not seated properly.
DIY PossibleAir-locked pump
Air trapped in the pump prevents it from priming.
DIY PossibleFailed pump
The pump motor or impeller has failed.
Requires ProfessionalSafe Checks You Can Do
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1
Check water tank
Remove the water tank, fill it with fresh water, and reseat it firmly.
Make sure the tank clicks into place — a loose tank won't supply water.
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2
Prime the pump
Run hot water (without coffee) 3-4 times to clear air from the pump.
Turn the steam wand on briefly to help push air out of the system.
When to Call a Professional
Contact a qualified technician if:
- Pump runs but produces no pressure
- Motor overheats
- Impeller broken
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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