The short answer
Where the water shows up tells you which seal has failed. Water on the floor at the front is the door-bottom seal or the door not closing square; steam and swollen worktop edges above the machine are the tub gasket. Both are replaceable parts rather than machine failures, and the tub gasket is the urgent one because the damage it causes is to the kitchen, not the appliance.
What you observe
- Water on the floor in front of the machine after a cycle — Door-bottom seal, or a door that is not pulling square against the tub.
- Steam escaping at the top of the door while running — Tub gasket. This is the one that damages the worktop above it.
- Swollen or discoloured worktop edge or cabinet side — Long-running steam leakage. The appliance is fine; the kitchen is not.
- Debris or a hardened deposit along the gasket — A common cause rather than a consequence — anything trapped holds the seal open.
- NEAR MISS — water under the machine but the door is dry — That is a hose, sump or pump leak and it belongs on a different page.
Causes, most likely first on this brand
- Debris and deposits on the sealing face — First, and the reason many gaskets are replaced unnecessarily. A fragment of label, a hardened detergent deposit or a piece of food on the sealing face holds the seal open along a short length, and the leak looks exactly like a failed gasket.
- Door-bottom seal wear or displacement — Second. It takes the brunt of both water and door movement, and it lifts out of its channel over time. Water then escapes at the bottom front, which is why the floor is wet and the cabinetry is not.
- Tub gasket hardening — Third, and the expensive one. Heat cycling hardens the gasket until it stops sealing along the top edge, and the steam that escapes goes straight into the worktop above. It damages the kitchen long before it inconveniences the owner.
- Door alignment and hinge tension on an integrated front — Last. A heavy decor panel and tired hinge springs stop the door from pulling square, so a perfectly good gasket is compressed on one side and open on the other.
Check in this order, and why
- Note where the water or steam actually appears — Bottom front means one seal, top edge means the other. Nothing else splits them so cleanly.
- Run a hand around the whole sealing face — Debris and hardened deposits are found by touch faster than by eye.
- Check the door-bottom seal is fully in its channel — Checked next because a lifted section is a free fix that mimics a failed part.
- Watch the door close and look at the gap along the top — An uneven gap points at alignment rather than at the gasket itself.
What an owner can safely check
- Switch off at the breaker before working at the machine — On a built-in machine the supply point is behind the cabinetry, so isolate at the breaker.
About 5 min
- Clean the full sealing face and the door edge — Warm water and a cloth; work all the way round rather than only where you saw water.
Tools: cloth, warm waterAbout 15 min
- Re-seat any lifted section of the door-bottom seal — Press it back into its channel along its whole length and check it stays.
About 10 min
- Run a short cycle and watch the door edges — Look and feel for steam at the top corners while it runs, then check the floor after.
Tools: torchAbout 45 min
- STOP HERE — removing an integrated door front is service work — Hinge springs are under tension and a decor panel is heavy enough to injure.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel — a capacitor can hold a charge after the power is off. Do not put your face near the door edge to look for steam during a hot cycle; check by hand held clear, or look after the cycle ends. Do not release hinge springs on an integrated door: they hold the weight of the cabinet front and will move hard when freed.
When to call a technician
Call when steam is escaping at the top edge with a clean gasket, because the worktop above is being damaged every cycle and that cost climbs faster than the repair does. Call for door alignment and hinge work on an integrated machine. A floor leak that persists after the bottom seal has been cleaned and re-seated also needs a technician, since the next suspects are the sump and hoses rather than the door.
Nearest pages of this class
What this page does not cover
This page is written for the Dacor dishwasher door seal as a class of fault and not for one family or model line. Gasket profiles, channel shapes, hinge kits and decor-panel fitment differ by family and belong on that family's page where one exists. Nothing here applies to a countertop dishwasher, whose door is a different construction entirely.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
