What causes ice build-up on an upright fridge evaporator?
FAQ
Evaporator ice build-up is almost always caused by moisture getting into the cabinet and then freezing on the cold coil. In busy Irish kitchens the most common triggers are:
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Evaporator ice build-up is almost always caused by moisture getting into the cabinet and then freezing on the cold coil. In busy Irish kitchens the most common triggers are:
Frequent or long door openings that pull warm, humid air into the fridge.
Damaged, dirty, or misaligned door gaskets letting air leak in even when the door is “closed”.
Overloading or blocking airflow (product pushed against the back wall, vents covered, shelves packed too tightly).
A blocked condensate drain or drain pan issue, causing water to sit and re-freeze.
Defrost system problems (timer/controller settings, sensor/probe, heater, or wiring), which prevents normal melt-off.
Light, even frosting can be normal, but thick ice that blocks airflow points to an underlying air leak, usage issue, or defrost fault.
Read the full guide: Troubleshooting Ice Build-up in Unifrost Upright Fridges: A Guide for Irish Kitchens.
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