The detergent dispenser cover on the Bosch SHXM4AY55N opens automatically at the ideal time for the set cycle, and Bosch's troubleshooting table lists the fault when it will not shut: the cover guides are blocked by sticky detergent residue, and the fix is to remove the residue. The manual's rules for adding detergent explain why it sticks: the dispenser must be dry and clear of residue, tablets must lie flat and not touch the cover, tablets must go in the dispenser itself and not the detergent tab tray, and the lid closes by sliding it until it clicks. Never fill the rinse aid dispenser with detergent.
Differential
Likely causes of “Bosch dishwasher detergent door will not open or detergent remains”, and how to tell them apart
- 1
Sticky detergent residue on the cover guides
What separates it The dispenser cover will not shut or click because of sticky detergent residue on the cover guides
How to confirm Remove the detergent residue and dry the dispenser before refilling
- 2
A damp dispenser
What separates it Detergent cakes on the lid and the cover sticks
How to confirm Make sure the detergent dispenser is dry and clear of residue before adding detergent
- 3
A tablet placed in the tab tray or touching the cover
What separates it The tablet does not release or the lid will not close
How to confirm Lay the tablet flat in the dispenser, not on its side and not in the detergent tab tray
- 4
The lock button did not release the dispenser
What separates it The dispenser is still closed when you go to fill it
How to confirm Push the lock button to open it if the dispenser is still closed
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether the cover clicks shut and the guides are clean
- The detergent form: powder, liquid or tablet
- Whether the dispenser was wet when filled
Try in this order
0 of 5 completedOpen the dispenser
ReversibleIf the detergent dispenser is still closed, push the lock button to open it. Make sure it is dry and clear of detergent residue.
Load the detergent correctly
ReversibleWhen using tablets, lay them so they do not touch the cover and insert a tablet flat, not on its side. Do not place tablets or utensils in the detergent tab tray; put tabs and other forms directly in the dispenser.
Do not overfill
ReversibleAdd the amount from the package or the dosing table and do not overfill the dispenser. Close the lid by placing a finger on the lid and sliding it closed until it clicks.
Remove residue
ReversibleIf the cover guides are blocked by sticky detergent residue, remove it so the cover slides and clicks, then dry the dispenser.
Check the racks
ReversibleMake sure no tall item blocks the dispenser or the spray arms so the detergent is distributed at the ideal time.
Model-specific
What is true of this model and not of its siblings
- Detergent notes from the manual
- Use only detergent specifically designed for dishwashers, fresh powdered detergent or tabs for best results, and never hand dishwashing products. The cup has measuring lines at 1 tablespoon (15 mL) and 1.75 tablespoons (25 mL). Multitabs users should set the rinse aid amount to 0, per the menu note.
- Parts for this problem on the SHXM4AY55N (RepairClinic, 2026-09-21)
- spring brake return, part number 532146682, at $9.33.
- Other models this page answers
- These steps also fit models SHE3AEM5N, SHE53B75UC, SHS43CF5N, SHP65CM5N, SHP865WD5N, SHP78CM5N, SHX78CM5N, SHV9PCM3N.
Stop boundary
When this stops being a self-service repair
- !If the cover will not shut after the guides are cleaned, contact Bosch Customer Support on 1-800-944-2904
- !If detergent leaks from the dispenser during the cycle, stop and check the leaking page
Evidence ledger
Sources behind this answer
Bosch's own list of dishwasher error codes with the fixes for E15, E18, E22, E24, E25 and E27.
Bosch's own owner-support articles for a dishwasher that will not drain, will not dry or smells.
Bosch's own specification sheet for this model.
Parts and list prices as shown on RepairClinic's parts search for this model number on 2026-09-21.
Exact questions
Common questions
Why will the detergent cover not shut?+
Sticky detergent residue is blocking the cover guides. Remove it.
Where do tablets go?+
Flat in the detergent dispenser, not in the detergent tab tray.
What is the tab tray for?+
Detergent tabs fall into it and dissolve there during the cycle; do not place tablets or utensils in it.
Does the dispenser open by itself?+
Yes, it opens automatically at the ideal time for the set cycle.
What if I put detergent in the rinse aid?+
Bosch says it will damage the dishwasher. Do not do it.
How much detergent should I use?+
See the dosing table; with soft water 1 tablespoon (15 mL) cleans most loads.
Can I use less for light soil?+
Yes, slightly less than the indicated amount is usually enough for lightly soiled dishware.
Is the dispenser large enough?+
3 tablespoons (45 mL) completely fills the dispenser.