The answer before the explanation
On the PX models, cooling complaints split by compartment. A freezer that is cold with a warm fresh-food side is a distribution fault - a damper, a fan or an ice sheet. Both compartments warm together is a system fault. Establishing which of the two you have is the whole first step.
Symptoms on this family
- The cabinet is warm and completely silent — No compressor, no fans. That is power, a start component or a control, and it moves this from a cooling diagnosis to an electrical one.
- Food in the fresh-food side spoils early while ice cream stays firm — The same split as the first item, described from the kitchen rather than from the machine.
- A thick sheet of frost on the back wall of the freezer — Not the light dusting a working cabinet carries: a continuous sheet means the defrost cycle has stopped clearing it.
- The compressor runs and never stops — The thermostat is never satisfied, so the machine is working flat out and still losing. That is the picture a frost blockage produces.
- Condensation on the outside of the doors — Seals and humidity, and it usually arrives alongside a cabinet that is running much longer than it used to.
The ranking that applies to this platform
- Evaporator fan stopped or obstructed — Second and closely related: no fan means no delivery, and the symptom is identical to the ice sheet from the kitchen side.
- Sealed-system fault or low charge — Last on purpose. It is the least common cause, it cannot be confirmed without gauges, and every cheaper cause above it produces the same complaint.
- Defrost cycle stalled, evaporator iced over — First on this family: the ice blocks airflow before it ever stops the cooling itself, so the cabinet keeps running and keeps failing to deliver.
- Start relay or overload protector failed — This is the silent-cabinet branch: the compressor cannot start, so nothing runs, and the cabinet warms evenly from wherever it was.
The diagnostic order for these models
- Check every door seal with a sheet of paper — Fast, free, and it finds the fault that makes a healthy machine behave like a sick one.
- Feel whether the machine compartment is hot and whether the condenser fan is turning — Hot with no fan is a specific and actionable finding rather than a general impression.
- Put a thermometer in each compartment and read them after a few hours — This costs nothing and it turns an anxious guess into a measurement, which is also what a technician will ask for first.
- Force a manual defrost by emptying the cabinet and leaving it off for a day — Both a test and a temporary repair: if cooling returns afterwards, the defrost circuit is implicated and the diagnosis narrows sharply.
What to do before you start
Safety
Unplug before servicing, and leave the door switch alone. It cuts the fan when the door opens so that nothing is turning while your hand is inside; it is not the thing to defeat to make a test easier.
Models in the PX family
Reference| Model number | Family key |
|---|---|
| PX30 | bougerv:refrigerator:px |
| PX40 | bougerv:refrigerator:px |
| PX50 | bougerv:refrigerator:px |
When to stop and book a visit
The line is the panel. Anything you can reach with the door open is yours; anything that needs the rear access panel off, a sealed-system gauge set or a wiring diagram belongs to a technician who carries all three.
Nearest pages of this class
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
