The short answer
On the Caf CDP family standing water at the end of a cycle is more often outside the machine than inside it: a new disposer with its knockout plug still in place, a blocked air gap, or a drain hose that has lost its high loop. One model tag covers this family in the matrix below, which keeps parts ordering simple and leaves the whole of the diagnosis to the symptom. Those three account for most of the calls, and none of them needs the machine opened.
What you can observe on these models
- Silence at the drain step — No pump drive at all — a control, a wiring or a pump motor fault rather than an obstruction.
- The sink gurgles while the dishwasher drains — The shared line is restricted, so the machine is pushing against a partly blocked disposer or trap.
- Water backs up out of the air gap on the sink deck — The line between the air gap and the disposer is blocked, which is a plumbing fix rather than an appliance one.
- Clean water rather than dirty water left behind — That is a fill-after-drain pattern: the machine drained and then took water on, which points at the inlet valve, not the pump.
- NEAR MISS — a little water in the sump well every time — A small residual in the well is by design; it keeps the seals wet. Only a covered tub floor counts as a drainage failure.
Causes, most likely first on this family
- Filter, sump and the pump inlet — Ranked first here: it is the only cause you can both confirm and fix without moving the machine.
- Drain pump impeller obstructed by glass or a stone — Second: the hum at the drain step is diagnostic, and the object is almost always visible once the sump cover is off.
- Air gap or disposer connection blocked — Third because the evidence appears outside the appliance and is easy to miss from in front of it.
- Drain hose routing and the high loop — Fourth: a lost loop siphons the tub back full after a successful drain, which is why clean water sometimes appears instead of dirty.
- Control board, door latch signalling or pump motor — Last because everything above is cheaper, faster and far more common.
Check in this order, and why
- Listen at the drain step — A hum with no water movement means a jam; silence means the pump is not being driven at all. That single sound splits the list.
- Scoop the standing water out — Nothing can be inspected under water, and the filter cannot be removed cleanly with a full tub.
- Clear the filter, then the sump, then the impeller — With the breaker off, each of these is a hand job on these models and they are in order of likelihood.
- Test-run a short cycle with the tub empty — A clean drain on an empty machine points back at soil load and filter maintenance rather than at a part.
Before you open anything
Safety
Kill power at the breaker before any disassembly — a capacitor can hold a charge after the power is off. If the machine has to be pulled out, close the hot water shutoff under the sink first, support the door so it cannot drop, and watch for the drain hose catching on the cabinet as it moves.
Models in the CDP family
Reference| Model number | Family key |
|---|---|
| CDP888**V*** | caf:dishwasher:cdp |
When to call a technician
Call once the obstruction cannot be found in the filter, the sump or the hose, because what remains is a pump or control diagnosis with a meter. Call sooner if the machine trips its breaker during the drain step or if water is coming up into the sink rather than going out. Both are faults that get worse with repeated cycles.
Other faults covered for this family
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
