Aging HVAC equipment drives repair costs above $1,500 during final years

https://precisioneverydayhvac.tearosediner.net/regular-tune-ups-extend-your-system-s-useful-life-to-15-plus-years-reliably

A typical HVAC service call in Sacramento ranges from $75 to $150 for diagnostics, but the real cost picture depends heavily on your equipment's age and remaining service life