R-Pro › Field cases › Air conditioning
AC Indoor Unit Water Drip — Condensate Leak Diagnosis
Likely causes
Step 1 — Identify leak point (drain pan, slope, trap, joints)
Check: Remove front panel/filter → inspect drain pan. Water pooling = slope deficient or clog. Side or rear leak = condensation on insulation or unit tilted. After 30 min OFF, water drip stops = condensate vs other. Inspect insulation (tears, moisture intrusion).
What to do: Clean inside pan → ensure ≥1% slope (1–2° back-tilt of indoor unit). For clogs, wet-vac or compressed air. Tilted unit = remount bracket. Damaged insulation = replace. After service, pour 2 L water and confirm drain within 90 sec.
Indoor leak = #2 most reported issue (after filter). Ceiling-recessed = upstairs/downstairs dispute risk → dispatch immediately. Mold/biofilm = main pan clog culprit; use antimicrobial cleaner at season start.
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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