Turn off power before any maintenance

Replace or clean air filters regularly

Clean the indoor and outdoor coils

Clear debris around the outdoor unit

Check and clean the condensate drain line

Inspect and tighten electrical connections

Check thermostat settings and batteries

Keep vents and registers unobstructed

Schedule professional servicing annually

Monitor refrigerant levels and leaks

Lubricate moving parts if required

Inspect insulation on refrigerant lines

Clean the blower components

Test the system for unusual noises or odors