Dishwasher leaves detergent tablet partially or completely undissolved in the dispenser.

Safety first: Turn off the dishwasher before inspecting the dispenser.

Step-by-step checks:

• Loading pattern: Ensure large plates or pans are not blocking the dispenser door from opening fully.
• Check spray arms: Clean and ensure spray arms rotate freely so water can reach the dispenser area.
• Test dispenser door: With the door open, manually close and release the dispenser latch. It should spring open easily. Replace the dispenser assembly if the latch is weak or jammed.
• Water temperature: Confirm that the heater is working; cold water can slow tablet dissolution.

After adjustments, run a cycle and check that the tablet is fully dissolved.