Flashing red light. Why won't the pump prime after cleaning?

The sensor is likely defective or needs to be cleaned of mineral buildup.

When the red exclamation point is flashing slow, something is not where it is supposed to be, bean hopper lid, door, brew mech, water tank empty, dregs box or water tray on dregs container is full. If the red exclamation point is flashing quickly, open the steam valve for pump priming. If pump turns on, and water passes correctly, the light should go off and return to heating stage. If not, we have a blockage or a pump that is not working correctly.

Have you tried draining off some back-pressure. That often is what the rapid flash means. Try pushing the hot water button then opening the steam valve. A few seconds after the pump comes on to push water out, the red light should go off. If it takes more than a few seconds, that's probably not the problem. hope this helps.

Make certain the line from the water resource is cleaned and not obstructed. If the pump fails to move the water from the reservoir to the heating tank, then the pump needs to be replaced.

when the red light blinking it means machine must be primed. BUT if you prime it and still red light -you have to change the FLOWMETER.

Run the hot water cycle for a few seconds to prime machine.

I had the same problem, two green flashing lights with one red (water) all 3 would just keep flashing and not turn solid. No coffee can be made or hot water. I could not pump prime. The problem was the steam wand was blocked with old milk residue. It needs unblocking or you will never pump prime. I could not unscrew the steam wand...so I let it sink in a glass full of hot water for a few minutes and then turned the water knob counter clockwise to push out the softened residue. After that, everything was good. When water started flowing out of the steam wand, the red light turned off and the green lights turned solid. The obvious answer to why you can't pump prime is there is a blockage somewhere and best to start with the steam wand. --Mabada

Either you need to prime the pump, or the brew unit is not in correctly, the steam knob is not in the right position, the tray is missing.

You can't manually reset. The machine will have to do it. I had the same problem, two green flashing lights with one red (water) all 3 would just keep flashing and not turn solid. No coffee can be made or hot water. I could not pump prime. The problem was the steam wand was blocked with old milk residue. It needs unblocking or you will never pump prime. I could not unscrew the steam wand...so I let it sink in a glass full of hot water for a few minutes and then turned the water knob counter clockwise to push out the softened residue. After that, everything was good. When water started flowing out of the steam wand, the red light turned off and the green lights turned solid. The obvious answer to why you can't pump prime is there is a blockage somewhere and best to start with the steam wand. --Mabada

Prime refers to priming the pump. The error message means that there is air in the system which is preventing the pump from pumping water. To correct this, fill the tank with water, press the water button on the right side, and turn the water/steam knob to open. Allow the water to flow until the stream is steady. Press the water button again and your problem should be fixed