ADD WATER / ERR3 (KCM Series)

KitchenAid Inlet Valve / Check Valve Restriction

KitchenAid KCM-series drip coffee maker shows ADD WATER or ERR3 and stops brewing with water still in reservoir.

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Clogged inlet check valve at reservoir connection, Mineral scale in inlet tube, Deformed reservoir outlet seal, Airlock in inlet line

How to Fix / Troubleshooting

Inspect reservoir outlet:

Remove the reservoir and examine the outlet valve at the bottom. Press it gently with a clean tool to ensure it opens and closes smoothly.
Rinse the outlet under running water to clear debris.

Clean inlet port on machine:

Look into the reservoir cavity on the coffee maker. Use a damp cotton swab to clean any visible scale or coffee residue around the inlet port and seal.

Descale:

Run a descaling cycle with vinegar and water to dissolve internal scale around the inlet and check valve.

If the problem continues, the internal inlet check valve or tubing may be restricted and require disassembly and replacement.

Repair Difficulty

Medium 3/5

Required Part

Inlet Check Valve

Check Price on Amazon

We may earn a commission from links on this page.