The short answer
On the Amana 4w5j90 refrigerator family, a noise the cabinet did not used to make points at the tubing, because a noise that appears at one compressor speed and vanishes at another is two lines touching rather than a part wearing out. The brand-generic article puts the condenser fan at the top of this symptom; on this platform it sits fourth, behind causes that are quicker to rule out.
What you observe on these models
- A noise that comes and goes with no pattern anyone can find — Often two lines touching, because they only buzz at one particular speed.
- A drone that rises and falls with the compressor — Bearing or mounting noise rather than anything catching.
- A rattle that stops under a hand on the rear panel — Transmission through sheet metal, not a part that is failing.
- NEAR MISS — the sound only happens when a door closes — Hinges and closers, not machinery.
Causes, most likely first on this family
- Refrigerant tubing touching the cabinet or another line — First on this platform. 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.
- Compressor mounts, or the compressor itself — Second on these models. 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.
- Loose rear panel, drain pan or tubing touching the cabinet — Third, and less common than the two above. Nothing has failed. A fastener has backed off or a pan has shifted, and the machine is simply transmitting the compressor vibration into sheet metal that used to be damped.
- Condenser fan blade fouled, or its bearing worn — Fourth, and the least common of the four here. 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.
Check in this order, and why
- Look for two lines resting against each other at the back — Start here. Separating them by hand, with the power off, either fixes the noise immediately or rules the cause out.
- Rock the cabinet gently and listen for a change — Then this. Vibration that changes when the cabinet is loaded differently is mounting rather than mechanism.
- Press on the rear panel and the pan while the noise is happening — Third. If the noise stops under a hand, nothing has failed and a fastener is the whole repair.
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. Refrigerant work is licensed work. Do not cut, braze or vent a sealed system, and do not run a unit that is leaking oil at the compressor.
Models covered by the 4w5j90 family
Reference| Model number | Family key |
|---|---|
| 4w5j90-07 | amana:refrigerator:4w5j90 |
| 4w5j90-08 | amana:refrigerator:4w5j90 |
| 4w5j90-09 | amana:refrigerator:4w5j90 |
| 4w5j90-10 | amana:refrigerator:4w5j90 |
| 4w5j90-11 | amana:refrigerator:4w5j90 |
| 4w5j90-12 | amana:refrigerator:4w5j90 |
| 4w5j90-13 | amana:refrigerator:4w5j90 |
| 4w5j90-14 | amana:refrigerator:4w5j90 |
| 4w5j90-15 | amana:refrigerator:4w5j90 |
| 4w5j90-16 | amana:refrigerator:4w5j90 |
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 straight away if the noise arrived together with poor cooling or a hot smell, since then the noise is a symptom of something larger.
The other faults covered for this family
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