The short answer
Water under a commercial ADC is very often not from that machine. Dry the floor and run the bank one at a time before anything else. When it is this cabinet, the leading causes are cloth caught across the door gasket and a worn gasket face, then the dump valve seat. Supply hose connections and the tub seal come last.
What you observe
- Water on the floor between two machines — Could be either cabinet, or the trough.
- Water running from the door during the wash — Cloth across the gasket, or a worn gasket face.
- It only leaks on the extract step — A marginal seal failing under pressure.
- A steady weep at the back with the machine idle — A supply connection, not a wash fault.
- NEAR MISS — the trough overflows when the bank dumps — Room capacity, not a machine leak.
Causes, most likely first on this class
- Water from a neighbouring machine or the trough — First because in a shared room this is more common than any single seal failure. It is also free to rule out, and doing so saves opening a machine that was never at fault.
- Cloth caught across the door gasket face — Second: a large horizontal door is easy to trap a sheet corner in, and operators loading in a hurry do it constantly. The water follows the cloth straight out.
- Door gasket worn or hardened — Third: a commercial gasket sees far more cycles and far hotter water than a domestic one, so it stiffens and stops recovering shape on the high points.
- Dump valve seat or a supply connection weeping — Last. A weep at the rear with the machine idle points at a supply connection; one during the dump step points at the valve seat.
Check in this order, and why
- Dry the floor and run the bank one machine at a time — Free, and it decides whether this machine is involved.
- Note when in the cycle the water appears — Idle means supply; wash means door; dump means valve.
- Inspect the gasket face for trapped cloth — The commonest door leak and it needs no parts.
- Press around the gasket and check it recovers — Left until here because trapped cloth explains most of it.
What an operator can safely check
- Mop the floor dry and mark it, then idle the bank — Run one machine and watch where water first appears.
Tools: mopAbout 60 min
- Load the drum clear of the gasket and rerun — Keep every corner of cloth inside the door line.
About 60 min
- Wipe the gasket face and press it all round — It should spring back everywhere, not only on part of it.
Tools: clothAbout 20 min
- Look behind the machine for a weep with it idle — Supply connections leak whether it is running or not.
Tools: torchAbout 20 min
- STOP HERE if water comes from the valve or the tub — Both sit behind panels on a live machine.
Before you open anything
Safety
Isolate the machine at its own disconnect and lock it off before opening any panel; a capacitor can hold a charge after the power is off, and a commercial machine is often fed from a three-phase supply that one wall switch does not fully kill. Water on a laundry floor is hot and is a slip hazard before it is anything else, so barrier the area. Never force the door on a machine holding water.
When to call a technician
Call when this machine has been proved to be the source, the gasket is clean and recovers, and water still escapes — the valve seat or the tub seal is then the answer. Call a plumber instead when the trough overflows across the bank. Take the machine out of service at once if water is reaching an electrical enclosure or the floor around it stays live-wet during a cycle.
Nearest pages of this class
What this page does not cover
This page is written for the brand and the appliance class, not for one family or model line. Where a family- or model-specific page exists for your unit, that page is the more specific answer and you should start there. Deliberately absent: gasket and valve part identifiers, hose sizes, seat pressures and fault-code meanings, all of which differ between the soft-mount, rigid-mount and coin-operated families.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
