If the detergent door on the LG LDP6810 sticks, stays shut or leaves detergent behind, LG's manual has specific advice: remove the label on the dispenser before the first run, do not pull up on the dispenser to close the door, and check after the wash that the detergent was completely washed out. Some tablets are too big and stick in the dispenser; LG says to place the tablet on the base of the tub next to the filter before starting instead. Do not use tablets on short cycles, because they may not dissolve.
Differential
Likely causes of “LG dishwasher detergent door will not open or detergent remains”, and how to tell them apart
- 1
A tablet too large for the dispenser cup
What separates it The dispenser door stays closed or the tablet is still whole after the wash
How to confirm Put the tablet in the tub base next to the filter and run the cycle again
- 2
The shipping label was never removed from the dispenser
What separates it A new dishwasher leaves detergent in the cup on the first loads
How to confirm Peel off the label; LG says to remove it before running the dishwasher for the first time
- 3
A short cycle with a tablet
What separates it A partly dissolved tablet and white residue on dishes after a quick cycle
How to confirm Use loose powder or gel on short cycles; LG says tablets may not dissolve
- 4
The dispenser door was forced or pulled up when closing
What separates it The lid no longer latches or the spring feels loose
How to confirm Close the door gently without pulling up on the dispenser and call LG if the lid is damaged
Before you touch a setting
Record this first — changing settings destroys the evidence
- The detergent type: tablet, powder or gel
- The cycle you ran and whether the dispenser door popped open at all
- Whether the label was removed and whether anything blocks the dispenser lid
Try in this order
0 of 5 completedCheck what is blocking the dispenser
ReversibleOpen the dispenser cup and remove the label if it is still there. Make sure a plate or bowl in the rack is not pressed against the dispenser door.
Try the tablet in the tub
ReversibleFor a large tablet that sticks, LG says to place it on the base of the wash tub next to the filter before starting the cycle.
Use the right amount
ReversiblePut detergent in the compartment before starting any cycle except Rinse. The amount depends on the cycle, load size and soil, and too much leaves a film on dishes and the tub.
Match detergent to the cycle
ReversibleDo not use tablets for shorter wash cycles. If you use tablets without liquid rinse aid, choose Extra Dry, since LG says dishes and the tub will be wetter.
Close the door gently
ReversibleLG says not to pull up on the dispenser to close the dishwasher door, to avoid damaging it. After a wash, check that the detergent was completely washed out.
Model-specific
What is true of this model and not of its siblings
- Dispenser notes from the manual
- The detergent compartment is filled before every cycle except Rinse. The rinse aid dispenser has five levels (L0 to L4), default 2, and its lid locks the dispenser. Do not pull up on the dispenser to close the door.
- Parts for this problem on the LDP6810 (RepairClinic, 2026-09-21)
- detergent dispenser, part number AGM75469801, at $165.95; dishwasher door lock, part number AGM76209501, at $81.94.
- Other models this page answers
- These steps also fit models LDP7808, LDPH7972, LDFN4542, LDFN3432, LDF5545, Signature Kitchen Suite SKSDW2401 dishwasher.
Stop boundary
When this stops being a self-service repair
- !If the dispenser lid is cracked, will not latch or never opens, call LG customer service
- !If dishes are covered in residue with a fresh dispenser and the right detergent, call LG service
- !If foam or suds show up, stop using the wrong detergent and call if the leak message appears
Evidence ledger
Sources behind this answer
LG USA support page listing this model's manuals and warranty.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-21.
Exact questions
Common questions
Why is detergent left in the LG dispenser?+
LG says to check whether it was completely washed out after the wash. A tablet that is too big, a short cycle or a blocked lid can leave it behind.
Where do I put a tablet that sticks?+
On the base of the wash tub next to the filter, before starting the cycle.
Can I use tablets on a quick cycle?+
LG says not to use detergent tablets for shorter wash cycles, since the tablet may not dissolve completely.
Should I remove the label from the dispenser?+
Yes. LG says to remove the label on the dispenser before running the dishwasher for the first time.
How much detergent do I need?+
It depends on the cycle, load size and soil level. LG says too much leaves a film on dishes and inside the dishwasher.
When is detergent not needed?+
The manual says to put detergent in before any cycle except the Rinse cycle.
What does a wash booster do?+
LG says it helps remove spots, residue and the white film caused by hard water, but does not help remove excess detergent residue.