The answer to 'how much to replace preventive maintenance' is that the cost can vary widely depending on several factors. Typical ranges for annual preventive maintenance service can be anywhere from $100 to $500 or more, depending on the size and complexity of your HVAC system, your location, and the specific services included.
Preventive maintenance typically involves a thorough inspection, cleaning, and tuning of your HVAC system to ensure it's running efficiently and safely. This can include checking refrigerant levels, cleaning or replacing air filters, lubricating moving parts, and testing electrical components. The cost will also depend on whether you need any repairs or part replacements during the maintenance visit.