Identify the model and service history
Record the brand, model, installation date, manual, previous service and any fault or warning. Do not infer the system design from the word evaporative or use instructions for a different unit.
Use only user maintenance in the manual
Follow the exact maker’s directions for any user-serviceable parts. Do not open electrical enclosures, handle water-treatment chemicals, alter plumbing or repair controls unless the manual expressly assigns that task to the user. Stop if there is a fault, leak, damaged cable or unusual operation and contact a qualified HVAC technician.
Ask a qualified technician about servicing
Request a written assessment for the actual unit, including components checked, water system, controls, access, parts, price and limitations. Verify any licence or qualification required for electrical, plumbing or refrigerant-related work with the relevant local regulator.
Keep ventilation and health questions separate
This article makes no claim that evaporative cooling is safe, unsafe, essential or protective during an infection outbreak. For health or indoor-air questions, consult current public-health guidance for your location; for equipment operation, follow the maker and HVAC professional.
Separate servicing from household cleaning
Routine home cleaning does not service a cooler, clean internal ducts, test wiring or verify system performance. Define any nearby surface cleaning separately from HVAC maintenance.
