HVACopedia

All brands · General troubleshooting

Condensation on windows/walls, peeling paint

What is going on

Possible causes and checks for: condensation on windows/walls, peeling paint.

Likely causes

  • High RH vs cold surface (dew point table)
  • Missing vapour barrier
  • Bath/kitchen moisture

Check in this order

  1. Lower RH (dehumidify, exhaust fans), raise surface temp
  2. Vapour barrier warm side

More general guides

Related

Calculators and reference tables

Take it to the job

All guides, error codes and tips work offline in the HVACopedia app.

Open the app

Source: General HVAC service practice — verify per model. Written in our own words; check the manual for your exact model.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.