HouseSymptoms field intelligence
Likely causes
Failure modes and building-physics mechanisms connected to the clues that support or weaken them.
cause 60ventilation-and-airflow 8roof-envelope 7building-structure 6drain-waste-vent 5appliance-connections 4domestic-water-supply 4exterior-wall-envelope 4cooling-and-air-conditioning 3foundation-and-ground 3insulation-and-air-barrier 3site-drainage 3space-heating 3electrical-distribution 2leak 2windows-and-doors 2
cause⌁
Refrigerant or chemical leak
A system or stored product releases volatile material.
cause⌁
Blocked condensate drain
Cooling or heating condensate cannot leave the appliance normally.
cause⌁
Contaminated condensate pan or coil
Persistent moisture and debris in air-conditioning equipment create odor and deposits.
