The short answer
Abnormal noise or vibration on an AZB freezer usually comes down to the start circuit rather than the compressor: a relay that clicks and a compressor that never comes in is the noise on this list that means something. The order that follows puts the likeliest and cheapest causes first, and it is the order worth working in rather than starting with the part that sounds most serious. The AZB listings carry a masked suffix in the spine, so the trailing characters on your rating plate will differ from the table without changing the diagnosis.
What you actually observe
- A buzz that only happens at certain times of day — Resonance against something nearby that is not always there.
- A rattle that stops when the contents are moved — Loose items, shelves or baskets sitting close to the vibration.
- A hum that changes when a hand is pressed on the cabinet — Transmission through the shell rather than a mechanical fault.
- A click every few minutes with no run afterwards — The start circuit trying and failing, which is worth acting on.
- A loud run and a cabinet that is warming up — NEAR MISS: read the cooling-failure page for this cabinet first; the noise is secondary there.
- Body: Where a step below depends on which AZB listing you own, the table above is the reference; nothing here is written from a model outside it.
What causes it on the AZB platform, in likelihood order
- 1. The start circuit at the compressor — A relay that will not pull the compressor in produces a distinct click every few minutes with nothing following it, sometimes with a buzz alongside. The control ranks this high on AZB because a single listing means a single control variant, so it is either the fault or it is not.
- 2. What the cabinet is touching — A finger's width of clearance often changes the noise completely, which is why this is checked before anything is dismantled. Second on AZB: it takes longer to confirm than the cause above it, and it rarely arrives without warning.
- 3. The rubber mounts under the compressor — The mounts isolate the compressor from the shell. Once they harden with age the isolation is gone and the cabinet gets louder gradually, with no single day when anything broke.
- 4. A cooling or evaporator fan where one is fitted — The give-away is that it starts and stops precisely with the compressor rather than drifting in and out.
The order to work in on this platform
- 1. Listen for a click with no run following it — That sound names the start circuit by itself.
- 2. Pull it clear of walls and neighbours and listen again — One contact point can carry more noise than the whole appliance.
- 3. Press on the shell while it runs and listen for the sound to dampen — Damping under hand pressure means transmission, not damage.
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. A loaded cabinet is heavy and awkward to move, so empty it before shifting it to check clearance, and keep hands clear of any fan that is fitted. The AZB roster is a single listing, AZB33X20D*, so everything here applies to one build rather than to a range.
Models in the AZB family — The listings this family covers; it is a family page, not a model page.
Reference| Model number | Family key |
|---|---|
| AZB33X20D* | amana:freezer:azb |
When to call a technician
The line is the compressor and its start circuit. Clearance, levelling, baskets and mounts are owner checks; a knocking compressor or a relay that will not pull it in is a technician's visit, and it is not one to postpone if the food is at risk.
The other symptoms covered for this family
Related pages
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