Service call costs rise sharply once equipment surpasses 12-year reliability threshold
https://precision-anytime-hvac.cavandoragh.org/your-30-year-old-hvac-system-has-exceeded-its-manufacturer-s-intended-lifespan-and-needs-immediate-assessment-1
The average HVAC service call in Sacramento costs between $75 and $150 for diagnosis, but that initial fee only scratches the surface—the true cost depends entirely on your equipment's age and remaining service life