Symptom test: does your unit need sanitising?
Use this checklist to organise observations before contacting a technician. The result cannot diagnose the cause or confirm that a unit is clean.
Explanatory diagramWeak cooling has more than one possible cause
- Settings and room conditions.
- Restricted airflow or dirty components.
- A technical issue requiring measurements.
Do not automatically assume low refrigerant.
Other tools
- Calculator: how often your unit should be cleaned
- Calculator: how much more a dirty unit uses
- Pre-season checklist
- Before and after: what comes out of the unit
The information on this page is educational and based on cited sources; it does not replace medical advice. We do not do repairs, installation or refrigerant circuit work.