R-Pro › Field cases › Refrigeration systems
Double-Pane Glass Condensation (Internal Frost in Insulated Glazing)
Likely causes
Insulated glass unit seal failure — outside air infiltration
Check: Visually inspect glass panel edge sealing material — check for cracks or detachment; if internal condensation reappears after 24 hours = seal failure
What to do: Complete replacement of double-pane glass panel required (cannot be repaired on-site); request replacement from manufacturer or glass specialist; temporary measure: apply heater tape to outer edge
Double-pane glass heater wire break — anti-condensation not operating
Check: Measure glass edge heater wire resistance — normal value varies by manufacturer; open circuit = break; verify heater operation by measuring glass surface temperature
What to do: Panel replacement is unavoidable when heater wire breaks; temporary external heater tape — prolonged use may worsen internal condensation
Internal condensation in double-pane glass cannot be repaired on-site — panel replacement is the only solution; internal frost recurrence test: clean then monitor for 24 hours
All 565 cases work offline in R-Pro, with error codes for 62 brands and P-T data for 108 refrigerants.
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