The answer to 'how much to fix maintenance' is that the cost to fix HVAC maintenance issues can vary widely depending on several factors. In general, routine maintenance like filter changes and tune-ups typically range from $75 to $300, while more complex repairs like compressor or ductwork issues can cost $500 to $2,000 or more.
The specific cost will depend on the type of HVAC system, the extent of the problem, your location, the technician's labor rates, and the cost of any replacement parts needed. Getting quotes from local HVAC contractors is essential to understand the actual cost for your home.