The answer to 'air filter repair cost' is that the cost can vary significantly depending on several factors. Generally, the cost to replace an air filter in your HVAC system can range from $10 to $50 or more, depending on the type and size of the filter. The main factors that influence the cost include the filter material, size, brand, and whether you do it yourself or hire a professional HVAC technician.
For a basic filter replacement, you may be able to do it yourself for the lower end of that range. However, if your system requires a more specialized or custom filter, or if you need a technician to access and replace it, the cost can be higher. It's always best to get local quotes from HVAC professionals to understand the specific cost for your home and system.