What F10 Means
WHICH MACHINE THIS APPLIES TO: the Asko professional dishwasher DWC6432, in its DWC6432BIXXLSU and DWC6432BIXXLS forms, together with the DWC6433BIXXLS, whose manual prints the identical thirteen-code table. Three separate Asko documents carry that table and they agree with each other character for character. It belongs to Asko's professional line and it is grouped here with the rest of that line.
WHY A DOMESTIC ASKO DISHWASHER PAGE IS THE WRONG PAGE FOR THIS MACHINE: most of these numbers exist on the domestic machines too, and several of them carry different instructions there. The plainest example is the water pressure specification - the professional manual requires between 15 and 140 psi, which is 0.1 to 1.0 MPa, and the domestic books print a different and much lower minimum. The professional machine also has three codes that no domestic Asko dishwasher has, and it does not have one that several domestic machines do. Read the professional table for a professional machine.
WHAT F10 MEANS ON THIS MACHINE: the error table gives the message as "Overfilling water 1", and the action printed beside it is to unblock the drain pump.
WHY ASKO SENDS YOU TO THE DRAIN FOR AN OVERFILL: because the amount of water in a dishwasher is the difference between what comes in and what goes out. When the level is above what the programme called for, the commonest reason on this machine is not a valve letting extra water in but a drain that is not taking water away - and Asko's own action column says so by naming the drain pump and nothing else.
WHY THE SEVERITY IS HIGH IN A COMMERCIAL KITCHEN IN PARTICULAR: a machine holding more water than it should is a machine that can put water on a floor, and the floor here is usually a working kitchen with staff moving on it and electrical equipment standing on it. An overfill that goes unnoticed for an hour in a busy service is a different kind of problem from the same fault in a domestic kitchen.
THE SECOND OVERFILL CODE, WHICH IS NOT THIS ONE: this machine also has F54, "Overfilling water 2", and its instruction is entirely different - shut the water off and call, with a specific warning about the order in which the supply and the power are dealt with. If your display shows 54 rather than 10, read that page.
CLASSIFICATION: fault with a water-escape risk, and a documented owner action at the front of it.
Common Causes of F10
- Drain pump blocked by debris, foil, cutlery fragments or broken crockery
- Filters choked so that water cannot reach the drain path
- Drain hose blocked, kinked or crushed behind the machine
- Water leaking into the base and lifting the float
- Level or flow measurement reporting wrongly
🔧 One Safe Check You Can Try
Turn the machine's water supply valve off first and leave it off. A machine that has taken on more water than the programme asked for is still connected to the mains supply, and the valve is the only control over that from outside the appliance. Then look, before anything is opened: at the water level inside against the filters, and at the floor in front of and beneath the machine and around the units either side, because water tracks along a plinth line and appears somewhere other than where it started. Asko's published action is to unblock the drain pump, and on this machine the route to that is through the filters: with the power off at the breaker or the machine's isolator and the water cooled from a commercial wash temperature, lift out the coarse and fine filters and clear what has collected - in a commercial kitchen that is usually food debris, foil, cutlery, a cocktail stick or a fragment of crockery. Work with a torch, with cloths down and with something to put the debris in. If the level does not clear or the drain pump is blocked beyond the filter area, stop and call, because the pump body and the base of the machine are behind the base panel of a built-in appliance.
⚠ Why You Shouldn't Go Further Than That
- The water supply valve is closed first, because it is the only control over incoming water from outside the machine and an overfilling appliance is still connected to it.
- The machine is isolated at its breaker or isolator and the water is left to cool before the filters are lifted, because a commercial dishwasher runs hotter than a domestic one.
- The drain pump body and the base tray are behind the base panel of a built-in machine, reachable only by unfastening it and drawing it out with the plumbing attached.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.