The short answer
On the Caf CDP family poor cleaning is nearly always a water-delivery problem rather than a weak pump: a spray arm that cannot turn, a filter packed with soil, or wash water that never got hot. 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. Drying is a separate system on this platform, so a load that comes out clean but wet is a different fault from one that comes out gritty.
What you can observe on these models
- The top rack is noticeably dirtier than the bottom — The upper spray arm is not turning or is not being fed, so pressure is going to the lower arm alone.
- Detergent left caked in the dispenser cup at the end — The cup opened into a cycle with no water flow, or an item in the rack blocked it from opening at all.
- Plastics come out wet while china is dry — Normal for condensation drying: plastics hold too little heat to evaporate their own film.
- Spray arm holes visibly blocked — Seeds, labels and scale close the small holes first, which drops coverage long before it drops pressure.
- NEAR MISS — the cycle never starts or stops early — A control or latch problem produces dirty dishes without any wash system being at fault.
Causes, most likely first on this family
- Hard water and rinse aid — Ranked first here because a vinegar rinse distinguishes deposit from permanent etching in a single load.
- Filter, sump and the drain path between cycles — Second: retained soil in the filter comes back on the next load and adds its own film to the mineral one.
- Spray coverage — arms, holes and loading — Third because the pattern on the dishes already tells you whether this is the cause.
- Incoming water temperature and cycle selection — Fourth: short or eco cycles on cool water are doing what they were designed to do, and no repair will change that.
- Heating element or wash pump failure — Last, and the point at which the job needs a meter.
Check in this order, and why
- Read the pattern on the dishes — Uniform film is water and rinse aid; patchy grit is spray coverage; wet plastics alone are the drying system. Each sends you somewhere different.
- Run one load with a rinse-aid top-up and a fresh detergent — Two consumables changed at once is poor science, but it is the fastest way to clear the cheapest causes.
- Inspect the filter and the sump area for retained soil — What you find here predicts whether the next load will come out clean better than any other observation.
- Check the dispenser cup at the end of a cycle — Caked detergent means the cup never met flowing water, which is a loading or a dispenser fault rather than a wash one.
Before you open anything
Safety
Kill power at the breaker before working in the sump — a capacitor can hold a charge after the power is off. Do not mix cleaning products in the tub: chlorine and acid descalers together produce gas in a closed cabinet. Run any descaler exactly as its label says, alone, on an empty machine.
Models in the CDP family
Reference| Model number | Family key |
|---|---|
| CDP888**V*** | caf:dishwasher:cdp |
When to call a technician
Call when the complaint is sudden rather than gradual: a machine that cleaned yesterday and not today has lost a component, not a habit. On these models that means the wash pump, the diverter or the heating circuit, none of which are owner-testable. Call also if the tub never gets warm, since a dead heater turns every cycle into a cold rinse.
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.
