The short answer for DWT models
A leaking DWT dishwasher on an Avanti needs the water shut off before it is diagnosed, because this is one of the few appliance faults fed continuously by mains pressure. Once the supply is closed, the leak sorts quickly by where it appears: the door, the base, or the connections at the back.
What the owner sees
- The machine stops mid-cycle with a fault after a leak — Many machines have a base tray float that shuts them down when it lifts.
- Water around the door hinges at the lower corners — The point the door seal fails first on most designs.
- A leak that started after the machine was moved — A hose disturbed or a connection loosened during the move.
- Suds on the floor as well as water — Too much detergent, or washing-up liquid put in by mistake, and the overflow is the symptom.
- NEAR MISS — condensation on the door at the end of a cycle — That is the drying phase venting and it is not a leak.
The ranking for this family
- Door seal perished or displaced — Ranked first because the door is the only part of a dishwasher that opens, and its seal takes a set from thousands of cycles of heat.
- Tub seam or base tray cracked — Rare, and the one cause on this list that generally means replacing the machine.
- Over-sudsing from the wrong detergent — Washing-up liquid in the dispenser produces suds that climb straight out of the door.
- Drain hose connection loose — Leaks only at the drain step, which is why it is so often missed.
- Machine not level, so the door does not sit square — A twisted cabinet holds one corner of the seal open permanently.
Check in this order, and why
- Start with what the ranking makes most likely — The order below follows the ranking rather than the machine: four of the five causes above cost nothing to rule out on DWT models, so they come first.
- Check what detergent went in — Washing-up liquid in the dispenser produces suds that leave through the door, and it looks exactly like a seal fault.
- Note whether the leak follows the drain step — That timing points at the drain hose and at nothing else.
- Dry everything, put paper down and run a short cycle while watching — It is the only way to see where water actually starts rather than where it arrives.
- Pull the machine out and look at both hose connections — Supply at the top, drain at the waste.
Two isolations and one wait
Safety
Pull the plug or switch the breaker off, close the supply valve, and then wait for the machine to cool. A capacitor can hold a charge after the power is off, and the sump element of a dishwasher stays hot long after the cycle ends. Wear a glove when clearing the sump: glass fragments end up there and cannot be seen in water.
Models in the DWT family
Reference| Model number | Family key |
|---|---|
| DWT18V3S | avanti:dishwasher:dwt |
When to call a technician
The boundary on this machine is the base panel and the sump cover. Filters, spray arms, seals, hoses, loading and detergent are all yours. Anything that needs the machine out and a panel off is a service call, and so is any fault that has tripped a breaker.
Other DWT problems we cover
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
