The short answer
When a 4w3in40 refrigerator runs continuously and still drifts warm, the fault is usually upstream of the compressor. The generic Amana answer treats the compartments as one problem; on this platform the fresh-food side and the freezer fail apart, and which one is warm decides where you look. Start at the freezer, not at the back of the cabinet.
What you actually observe
- The freezer is cold but the fresh-food side is not — This split narrows the list faster than any other observation.
- Air at the vents is moving but not cold — That points at the coil rather than at the fan.
- Food spoiling faster than the display suggests — A display that disagrees with a thermometer inside the cabinet is worth more than the display.
- The sides or the back of the cabinet run hot — Some warmth is normal; too hot to leave a hand on is not.
Causes on the 4w3in40 listings, most likely first
- A condenser coil packed with dust — A blanketed condenser cannot reject heat, so the compressor runs longer and longer for less and less cooling. In a household with pets the coil can choke inside a single year. The long revision run above covers a lot of production, and the oldest listings in it reach this point first.
- A door gasket that no longer seals — A door held off its seal by a shelf, a bin or a crushed gasket costs more cold than any setting change can recover. It is worth ruling out first precisely because it costs nothing to check.
- The damper between compartments stuck shut — The diffuser can seize in the closed position after a defrost puddle refreezes in it. Nothing else on this list produces a cold freezer and a warm fridge at the same time.
- A thermistor reading the wrong temperature — The control only knows what its sensors tell it, so a drifting thermistor lets the compartment sit warm while the display insists it is cold. A display that disagrees with a thermometer inside the cabinet points straight here.
Check in this order, and why
- Check the condenser coil and the condenser fan — Do this before anything behind a panel, because it is free, quick, and fixes more of these than any single part.
- Confirm the damper between compartments opens — Worth doing early only when the freezer is cold and the fridge is not, and worth skipping entirely when both are warm.
- Check the setting and rule out showroom mode — It sounds trivial, and it is the check that saves a call often enough to be worth one minute.
- Leave a thermometer in the cabinet overnight — A single reading tells you little; a reading taken after the door has been shut for hours tells you whether the control is lying.
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 chip frost off an evaporator with a screwdriver or a knife: the tubing behind it is thin-walled, and one puncture turns a free defrost into a sealed-system repair. A refrigerator holds food safely at 40 °F (4 °C) or below, so move perishables to a cooler before you start rather than after.
Models in the 4w3in40 family — 29 listings spanning a long revision run; the suffix marks production date rather than a change of mechanism.
Reference| Model number | Family key |
|---|---|
| 4w3in40-10 | amana:refrigerator:4w3in40 |
| 4w3in40-11 | amana:refrigerator:4w3in40 |
| 4w3in40-12 | amana:refrigerator:4w3in40 |
| 4w3in40-13 | amana:refrigerator:4w3in40 |
| 4w3in40-14 | amana:refrigerator:4w3in40 |
| 4w3in40-15 | amana:refrigerator:4w3in40 |
| 4w3in40-16 | amana:refrigerator:4w3in40 |
| 4w3in40-17 | amana:refrigerator:4w3in40 |
| 4w3in40-18 | amana:refrigerator:4w3in40 |
| 4w3in40-19 | amana:refrigerator:4w3in40 |
| 4w3in40-20 | amana:refrigerator:4w3in40 |
| 4w3in40-21 | amana:refrigerator:4w3in40 |
| 4w3in40-22 | amana:refrigerator:4w3in40 |
| 4w3in40-23 | amana:refrigerator:4w3in40 |
| 4w3in40-24 | amana:refrigerator:4w3in40 |
| 4w3in40-25 | amana:refrigerator:4w3in40 |
| 4w3in40-26 | amana:refrigerator:4w3in40 |
| 4w3in40-27 | amana:refrigerator:4w3in40 |
| 4w3in40-28 | amana:refrigerator:4w3in40 |
| 4w3in40-29 | amana:refrigerator:4w3in40 |
| 4w3in40-30 | amana:refrigerator:4w3in40 |
| 4w3in40-31 | amana:refrigerator:4w3in40 |
| 4w3in40-32 | amana:refrigerator:4w3in40 |
| 4w3in40-33 | amana:refrigerator:4w3in40 |
| 4w3in40-34 | amana:refrigerator:4w3in40 |
| 4w3in40-35 | amana:refrigerator:4w3in40 |
| 4w3in40-36 | amana:refrigerator:4w3in40 |
| 4w3in40-37 | amana:refrigerator:4w3in40 |
| 4w3in40-38 | amana:refrigerator:4w3in40 |
When to call a technician
The line on these models is the rear freezer panel: everything in front of it is an owner check, everything behind it needs the evaporator exposed and a way to read it. If the fan is silent with the door switch held in, that is a parts job rather than a diagnosis.
The other symptoms covered for this family
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