Hello,
What this indicate i that there have been a blockage on the desolve scale to the vibrating pump. You are write sometimes it can be unstuck by itself hoever, this time is seems that more scale blocked inside the pump.
What you are to do is to open coffee machein then trace the pump directly and clean it with a wire brush.
If you find it dificult you can try decalcifying solution once more and leave it for more time inside the machine so that more calcium will be desolve and probably you will have the pump unstuck.
When you try to test the machine dont leave it work continuasly for more than 2 min cause this will burn the coil of the pump.
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Thank you and thanks for using fixya.
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If you say pump--what number is that on the diagram--this is a BT-3--not BT-3A--are they different?? are you speaking about the clear plastic hoses??
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