The answer to 'what is preventive maintenance' is preventive maintenance for HVAC systems involves regularly scheduled service and inspections to keep the equipment running efficiently and prevent major breakdowns. This includes tasks like cleaning or replacing air filters, checking refrigerant levels, lubricating moving parts, and inspecting electrical components.
Preventive maintenance helps HVAC systems operate at peak performance, extends the lifespan of the equipment, and reduces the need for costly repairs down the road. It's an important part of responsible home ownership and can save homeowners money in the long run.