The short answer
A MFC washer that will not empty is nearly always blocked rather than broken. The drain path on a compact machine is short and narrow, so the pump filter and the hose account for most of these faults, and both are reachable without opening the cabinet.
What you observe
- The standpipe or sink backs up while the machine empties — The restriction is in the house drain rather than in the machine, which is a distinction worth making before any part is bought.
- It drains, but slowly, and the spin is poor as a result — A partial restriction. Clothes come out wetter than they should because the spin started with water still present.
- Water comes back into the drum after it has drained — Siphoning from a drain hose set too low or pushed too far into the standpipe.
- The cycle ends with water still in the drum — The clearest form of the fault. The machine has finished its timed attempt and given up.
Causes, most likely first
- A blocked pump filter — First on this family and by some distance. The filter is the last thing before the pump, the drum lets everything through to it, and on a compact machine it fills quickly.
- A kinked, trapped or badly routed drain hose — Second. A portable machine gets moved, and the hose behind it gets pushed against a wall or folded over itself.
- A failed drain pump or its supply — Last, and it is the cause that needs a panel off. Silence at the drain step rather than a pump straining is the symptom that actually points here.
- Drain height or a hose pushed too far into the standpipe — Set too low or inserted too far, the machine siphons and water returns after it has drained. It looks exactly like a failed pump and it is entirely an installation cause.
Check in this order
- Run a tap or flush the standpipe and watch it clear — Settles whether the restriction is the machine or the house before any part is bought.
- Check the height the drain hose discharges at — Too low and the machine siphons; too high and the pump cannot lift the water within the time the cycle allows.
- Pull the machine out and follow the drain hose end to end — Look for a fold, a crush point behind a foot, and how far the end sits inside the standpipe.
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. Never put a finger to a pump impeller on a machine that is still connected, because a held cycle can restart the pump the moment power returns.
Models in the MFC family — The models this page covers, as the product spine lists them. This family spans more than one stem, and the stem is worth confirming in the table before any part is ordered.
Reference| Model number | Family key |
|---|---|
| MFC120-DU1421BS/C14E-US | black-decker:washer:mfc |
| MFC120-U1421BS/C14E-US | black-decker:washer:mfc |
When to call
Call when the filter is clean, the hose runs clear at the right height, the standpipe drains freely and the machine still holds water. At that point the fault is the pump or its supply, both of which are behind a panel.
Other faults on 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.
