The short answer
On the Amana 4w9g00 refrigerator family, a noise the cabinet did not used to make points at the compressor and what it is bolted to, because on a long-lived cabinet the noise usually arrives gradually rather than overnight. The brand-generic article puts the condenser fan at the top of this symptom; on this platform it sits second, behind causes that are quicker to rule out.
What you observe on these models
- A drone that rises and falls with the compressor — Bearing or mounting noise rather than anything catching.
- A rhythmic tick or clatter from behind the cabinet — Keeping time with something turning, which is how a fouled fan announces itself.
- A knock at every start and nothing in between — A cabinet rocking on uneven feet, or a floor that flexes under it.
- NEAR MISS — the sound only happens when a door closes — Hinges and closers, not machinery.
Causes, most likely first on this family
- Compressor mounts, or the compressor itself — Ranked first here. Rubber mounts harden with age and stop isolating a vibration that was always there. A genuinely failing compressor is loud in a different way, with a knock rather than a hum.
- Condenser fan blade fouled, or its bearing worn — Next. The fan lives in the dirtiest part of the machine. Debris on the blade produces a rhythmic tick, a worn bearing produces a drone, and both get louder as the compressor gets hotter.
- Cabinet not level, or the floor it stands on — Third in order. A cabinet resting on three of its four feet rocks at every compressor start. Floors that flex make the same noise without the appliance being at fault at all.
- Refrigerant tubing touching the cabinet or another line — Last, and the least likely of the four. Two lines resting against each other buzz at one particular compressor speed and go quiet at others, which is why the noise seems to come and go without a pattern.
Check in this order, and why
- Rock the cabinet gently and listen for a change — Start here. Vibration that changes when the cabinet is loaded differently is mounting rather than mechanism.
- Listen at the back while the compressor runs — Then this. A tick that keeps time with the fan, or a drone that rises with it, is identified from the room without a tool.
- Check the feet and the floor — Third. A cabinet that rocks under hand pressure knocks at every compressor start, and so does a flexing floor.
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. If the cabinet has been pulled out, check the water line has not been pinched or kinked before it is pushed back.
Models covered by the 4w9g00 family
Reference| Model number | Family key |
|---|---|
| 4w9g00-03 | amana:refrigerator:4w9g00 |
| 4w9g00-04 | amana:refrigerator:4w9g00 |
| 4w9g00-05 | amana:refrigerator:4w9g00 |
| 4w9g00-06 | amana:refrigerator:4w9g00 |
| 4w9g00-07 | amana:refrigerator:4w9g00 |
| 4w9g00-08 | amana:refrigerator:4w9g00 |
| 4w9g00-09 | amana:refrigerator:4w9g00 |
| 4w9g00-10 | amana:refrigerator:4w9g00 |
| 4w9g00-11 | amana:refrigerator:4w9g00 |
| 4w9g00-12 | amana:refrigerator:4w9g00 |
| 4w9g00-13 | amana:refrigerator:4w9g00 |
| 4w9g00-14 | amana:refrigerator:4w9g00 |
| 4w9g00-15 | amana:refrigerator:4w9g00 |
| 4w9g00-16 | amana:refrigerator:4w9g00 |
| 4w9g00-17 | amana:refrigerator:4w9g00 |
| 4w9g00-18 | amana:refrigerator:4w9g00 |
| 4w9g00-19 | amana:refrigerator:4w9g00 |
| 4w9g00-20 | amana:refrigerator:4w9g00 |
| 4w9g00-21 | amana:refrigerator:4w9g00 |
| 4w9g00-22 | amana:refrigerator:4w9g00 |
| 4w9g00-23 | amana:refrigerator:4w9g00 |
| 4w9g00-24 | amana:refrigerator:4w9g00 |
| 4w9g00-25 | amana:refrigerator:4w9g00 |
| 4w9g00-26 | amana:refrigerator:4w9g00 |
| 4w9g00-27 | amana:refrigerator:4w9g00 |
| 4w9g00-28 | amana:refrigerator:4w9g00 |
| 4w9g00-29 | amana:refrigerator:4w9g00 |
| 4w9g00-30 | amana:refrigerator:4w9g00 |
| 4w9g00-31 | amana:refrigerator:4w9g00 |
| 4w9g00-32 | amana:refrigerator:4w9g00 |
| 4w9g00-33 | amana:refrigerator:4w9g00 |
| 4w9g00-34 | amana:refrigerator:4w9g00 |
| 4w9g00-35 | amana:refrigerator:4w9g00 |
| 4w9g00-36 | amana:refrigerator:4w9g00 |
| 4w9g00-37 | amana:refrigerator:4w9g00 |
| 4w9g00-38 | amana:refrigerator:4w9g00 |
| 4w9g00-39 | amana:refrigerator:4w9g00 |
When to call a technician
Call once the free checks are clean and the noise is still there, because what remains is a fan bearing, a mount or the compressor, and all three want the cabinet moved. Call if the noise is a knock rather than a hum or a tick. A knocking compressor rarely gets better and is worth quoting before it stops entirely.
The other faults covered for this family
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