AGA dishwasher detergent residue left in the dispenser
Common issue — here is how we diagnose it, which parts are usually involved, and when to call a pro.
- Common
- Try this first, then call a pro
- Dishwasher
Symptoms
What you will notice
- Detergent left in the cup after a cycle
Likely causes
What is usually behind it
- Moisture in the dispenser before fillingcommon
- Detergent left sitting in the dispenser too longcommon
- Dispenser lid blocked by large dishware or utensilsmost common
- Detergent moist or clumping from poor storagecommon
- Spray arm nozzles clogged or arms blockedcommon
- Cycle terminated earlycommon
- Dispenser mechanism failedgenuine fault
Diagnostics
How a technician diagnoses it
Our technicians follow the factory diagnostic path for this fault.
- 1Work the owner's-guide causes in order before condemning the dispenser.
- 2Advise storing detergent dry and no longer than two months in an open package.
- 3Confirm loading does not block the detergent cup.
Safety & DIY disclaimer
Guides on this site are for information only. Appliance repair involves 240V electricity, gas connections, refrigerant and heavy cast-iron parts — anything you do yourself is at your own risk and can damage the appliance or cause injury. The safe option is to book a qualified technician.
Parts
Parts usually needed
We confirm the failing part with diagnostics before replacing anything.
Coverage
Appliances affected
Keep reading
Related AGA problems
Frequently asked questions
Can I fix this myself?
Try this first, then call a pro. You can try the basic checks listed on this page; if the symptom returns, book a diagnostic visit.
How much does it cost to fix this issue?
Every visit starts with diagnostics and a written estimate — the diagnostic fee applies toward your repair when you proceed. We never start work without your approval.
Not sure? We diagnose first.
Book a diagnostic visit — you get a written estimate before any work, and the diagnostic fee applies toward your repair.
Mon–Sun 8:00AM–8:00PM
Independent service company — not affiliated with or authorized by AGA / AGA Rangemaster (Middleby). We repair out-of-warranty AGA appliances.