The short answer
A MAS washer that will not begin a cycle is worth diagnosing from the outside in: the socket and its circuit, then the lid or door, then the taps, then the selection. Almost every one of these faults is resolved before the cabinet is opened.
What you observe
- It starts only if the lid or door is pressed hard — A marginal interlock, and that is a complete diagnosis on its own.
- It hums or clicks and then stops — Something is trying and not turning. On a light machine a locked drum or a jammed pump will do this.
- No lights, no sound, nothing at all — A supply fault rather than a machine fault. Nothing inside the cabinet is worth suspecting until power is proven at the socket.
- It starts and then pauses within seconds — A fill condition not met, or an interlock dropping out.
Causes, most likely first
- The outlet, the plug or the circuit feeding it — First on this family. A compact washer is portable and gets plugged into whatever is nearby, which means extension leads, shared circuits and worn sockets.
- The lid or door interlock — Second. The machine will not run without proof the drum is closed, and an interlock that has been knocked, or a door that is not quite latching, produces exactly the symptom of a dead machine that has power.
- A cycle that has not actually been started — A paused control, a delay setting still running or a cycle selected but not confirmed will all leave a lit panel and a still machine. It sounds trivial and it accounts for a real share of calls.
- The control board or the start switch — Last. It is the expensive end and it is the least likely on this family.
Check in this order
- Move the cord along its length while trying to start — Last of the free checks.
- Test the socket with something else you know works — First, because a portable machine gets plugged into the nearest outlet and that outlet is the leading suspect.
- Check the breaker for that circuit, and what else is on it — Second, and it also settles whether the machine has been sharing a circuit with something heavy.
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 defeat the lid or door interlock to make a machine start: it is the only thing that stops the drum with a hand in it.
Models in the MAS 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 |
|---|---|
| MAS120-2006PS/01M-US-S1 | black-decker:washer:mas |
| MAS70-1106PS/01M-US | black-decker:washer:mas |
| MAS80-506PS/01M-US | black-decker:washer:mas |
When to call
Call if the machine trips protection, if the cord or plug shows heat or damage, or if it hums and stops with a drum that turns freely. The first two are electrical and urgent; the third points at the motor or its start components, 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.
