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An MT unit that has become noisy is, more often than not, telling you about the room it is in. The cheapest explanation is almost always the load rather than the machine, so the ranking here puts position and load above machinery. Start with contents and baskets vibrating and leave a worn fan bearing until everything cheaper has been excluded.
The observables
- A rattle that comes and goes within a run — It appears for a few seconds at a particular point and then clears on its own.
- A continuous whine while air is moving — It tracks the fan rather than the compressor and stops when the fan does.
- A buzz that you can feel through the case — Felt as much as heard, and it changes if you rest a hand on a panel.
- The unit walks slightly over time — It ends up a finger further from the wall each week, which is vibration finding a path out.
- NEAR MISS - a hum with a burning smell — Isolate it and stop. A hot electrical smell is not something to diagnose by ear.
Causes, most likely first on this line
- Contents and baskets vibrating — The leading cause on these models: bottles touching each other, a wire basket resting on a rail and packaging against the liner all buzz at the compressor frequency. On a small cabinet the panels act as a soundboard, so a trivial contact is loud.
- The cabinet not standing squarely — Second: the unit is light enough to be moved by its own machinery. Standing on three of its four feet, or on a surface that flexes, turns an ordinary start into a bang that carries through the room.
- The cabinet touching a wall or furniture — Third, and worth excluding before going further: a case pressed against a wall, a cupboard or another appliance transmits vibration directly into it, and the second object rattles at its own frequency. That rattle is what gets reported, not the compressor.
- A worn fan bearing — It ranks below everything free to check because replacing it means getting into the fan housing.
The order to work in
- Run the unit empty for a minute — Take everything out, close the door and listen. If the noise has gone, it was load, not machinery, and the fix is how the cabinet is packed.
- Press each corner in turn — Slide the unit a hand-width and listen again. A noise that changes with position is the stance or the surface, never the compressor.
- Pull the unit clear of everything it touches — Pull it a hand-width from the wall and from anything beside it, then listen. A noise that halves has been telling you about the contact, not the machine.
Before any panel comes off
Safety
Unplug the appliance or switch off its breaker before removing any panel. A capacitor can hold a charge after the power is off, and the machinery bay contains both the electrics and sealed pipework that should not be levered or bent.
Models in the MT family
Reference| Model number | Family key |
|---|---|
| MT25 | alpicool:refrigerator:mt |
| MT35 | alpicool:refrigerator:mt |
When this stops being owner work
Anything you can change from outside the cabinet is owner work. A continuous whine from the fan housing, a knock that can be felt through the case, or a noise accompanied by longer run times is a call.
Same line, other symptoms
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
