The commercial air conditioning maintenance checklist every business needs

Commercial systems fail in July. Almost never in February. That is not bad luck, it is the first hot week exposing twelve months of neglected maintenance all at once.

Quarterly: check and clean filters, inspect condensate drains and pumps, confirm outdoor coils are clear of leaves and litter, and log any error codes.

Twice a year: full coil clean, refrigerant pressure and superheat checks, electrical connections torqued, fan bearings inspected, and controls tested through both heating and cooling modes.

Annually: F-Gas leak check where the charge exceeds the regulatory threshold, records updated, and a written condition report identifying any parts approaching end of life.

The legal side matters. If your system contains 5 tonnes of CO₂ equivalent or more, leak checking is a statutory duty and records must be kept for at least five years. Enforcement is real, and inherited systems are frequently non-compliant without the operator realising.

The commercial reality is simpler still: a planned service costs a fraction of an emergency callout in a heatwave, and a fraction again of a shop or restaurant losing a trading day.