What this usually is on these models
A ZGW unit that runs constantly and stays warm is working hard at something that is not cooling. What went into the cabinet and when explains more cooling complaints than any component does, so the checks below start outside the cabinet and move in. The first check on this line is the simplest one - judge the load and then leave it alone - and the cause at the bottom of the list is the only one that is not owner work.
What you observe
- A sheet of ice on the cold plate — Frost thick enough to feel as a layer, with the cabinet warm despite it.
- It recovers overnight and fails again by afternoon — A pattern that follows the room rather than the machine.
- Cabinet temperature is stable but higher than expected — Steady rather than drifting, which usually means the control is holding it there on purpose.
- NEAR MISS - freezes everything instead — Over-cooling is a control or setting question rather than a cooling failure, and the diagnosis runs the other way.
Ranked causes for these models
- A warm load or an overfilled cabinet — First here, and by a wide margin: the pattern is a unit that was fine until the day it was filled, and that recovers on its own if it is left alone and not opened.
- A door or lid that is not sealing — Second on this line: a gasket that has taken a set, a door held ajar by contents, or a hinge that has dropped lets the cabinet exchange air continuously. The compressor never stops and the cabinet never gets down, so it reads as a cooling failure.
- An ambient temperature outside what the unit can handle — It ranks with the environmental causes because the fix is position and ventilation rather than a part.
- A loss of refrigerant charge — Last on the list, and the only one here that is not owner work: it is diagnosed by exclusion and by what the machinery end is doing, never by guesswork, and the work itself is licensed work.
What to check first, second, third
- Judge the load and then leave it alone — Ask what went in and when. A big warm load the day the complaint started explains the complaint.
- Test the seal at several points — Close the door on a strip of paper at the top, the middle and the bottom of each side and pull. Anywhere it slides out freely is a leak, and the coldest part of the cabinet will be furthest from it.
- Measure the room, not just the cabinet — Move the unit somewhere cooler for a day as a test. Normal behaviour in a cooler position settles the question.
Read this before you start
Safety
Switch off at the breaker or pull the plug before anything is opened, since a capacitor can hold a charge after the power is off. Do not run the unit from a damaged lead or a loose socket while testing; a supply that sags under a compressor start also heats what it is running through.
When to call a technician
The line is whether the unit makes any cold at all. A cabinet that gets partly cold has an airflow or a distribution problem worth chasing at owner level; a cabinet that makes none after the free checks needs a technician.
Other faults covered for this line
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
