why is a tablet left undissolved in my dishwasher?
a tablet can remain undissolved when the dispenser lid is blocked or spray water cannot reach it. the detergent form may also be unsuitable for a short cycle.
with the dishwasher off and cool, clear detergent residue and move any dish or utensil that prevents the dispenser opening. check that the spray arms turn freely and that the loading does not shield the dispenser from water.
the linked detergent guide covers manually filled compartments, fresh dishwasher detergent and the dose or form recommended for the chosen programme. use powder for a short cycle only if the exact manual recommends it; do not assume every model has a tablet-catching tray. the linked spray-arm guide deals separately with permitted removable-arm care.
if detergent remains after suitable loading and a complete cycle, arrange assessment. do not dismantle the dispenser or treat a leftover tablet alone as proof of a failed heater.
possible causes
- a dish or utensil blocking the dispenser lid
- an obstructed spray arm
- detergent that does not suit the selected cycle
solutions
- how to help dishwasher detergent dissolve properlygive the manually filled dispenser room to open and the spray arms room to turn. choose fresh dishwasher detergent in the form and dose suited to the cycle.
- how to load a dishwasher so the spray arms can turnseparate nested dishes and move protruding utensils, then turn the arms gently by hand. remove a blocked arm only by the model's permitted method.
diy warning
working on appliances can involve mains electricity, water and moving parts. always disconnect power and water before you start. in Australia, gas work must be done by a licensed gasfitter, and fixed (hard-wired) electrical work by a licensed electrician. everything on this site is guidance only, and any repair you carry out is at your own risk. we are not responsible for any damage or injury caused by attempting a repair. if you are not confident, please use a qualified technician.
