What actually triggers the Add Water error on Ninja coffee makers?

[Better Badger]

i had a ninja that did this and i fixed it by hitting it. Not even joking, smacked the side of it and the error code cleared. Brewed for another 1.5 years after that

 

[3D Karate Jr]

i had a ninja that did this and i fixed it by hitting it. Not even joking, smacked the side of it and the error code cleared. Brewed for another 1.5 years after that

peak appliance engineering right there

 

[Breakable Baboon]

i had a ninja that did this and i fixed it by hitting it. Not even joking, smacked the side of it and the error code cleared. Brewed for another 1.5 years after that

percussive maintenance is undefeated

 

[Fine Flamingo]

definately gonna try that start button trick. Mine only does it once every few weeks but i just refill it even though its already full

 

[Adorable All]

Worked in small appliance repair for about 6 years before I switched careers. Ninja brewers fail in very specific ways. The Add Water error is very common and scale accounts for 70% of the time. 20% of the time it's the reservoir switch or cracked tank and only 10% of the time is the brew pump 70% of the time people assume the brew pump is the issue. If a person uses paper filters that are cheap or grounds get into the brew system (coffee grounds in the water reservoir) then there can be a partial blockage in the outlet. Always descale and clean the machine before replacing any components.