Cooling and Airflow Checks
Because a True is commercial-grade, it counts on a clean condenser coil and clear airflow to work. Start by vacuuming the coil, usually behind the grille, so the compressor can shed heat; a dust-packed coil is the most common cause of warm cabinets and nonstop running. Confirm the door seals fully by closing it on a slip of paper and feeling for drag. Do not overpack a wine column, and keep interior vents clear so cold air circulates. Give the unit several hours after any change before judging whether it recovered.
Frost, Noise, and Recovery
Light frost near an evaporator vent can be normal; heavy ice buildup points at a door left ajar or a defrost problem, and you should not chip at it. A True that runs constantly with a clean coil and good seals may have a failing fan or a sealed-system issue. Some hum and cycling noise is normal for a commercial compressor, but new rattles or a loud, continuous drone are worth a diagnosis. If the interior temperature will not come down after you have cleaned the coil and confirmed the seals, it is time for a technician.
| Symptom | Try First | If It Continues |
|---|---|---|
| Not cooling enough | Vacuum coil, check door seal | Compressor or sealed system |
| Runs constantly | Clean coil, clear airflow | Evaporator fan service |
| Heavy frost buildup | Check door alignment | Defrost heater service |
| Wine temp unstable | Do not overpack, clear vents | Thermistor or fan diagnosis |
| New loud noise | Confirm unit is level | Fan or compressor service |
Where to Stop
Do not open the sealed refrigeration system, do not chip ice with a tool, and do not attempt to recharge refrigerant, which requires confirmation of applicable qualification requirements. Cleaning the coil, checking seals, and clearing vents is the limit of safe DIY on a True; sealed-system and fan work is for a technician.
Still Not Right?
Book a diagnosis with a brand-focused technician. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.