Skip the Basic Filter Change? This Happens 🔧 What you’re seeing here is why annual HVAC maintenance isn’t optional it’s essential. This unit had a major issue caused by poor filter maintenance and skipping yearly service. The system is full of dust, debris, and coil buildup that restricts airflow, raises pressure, and ultimately leads to unnecessary downtime. Here’s the deal: A clean $150 basic tune-up every year protects a $10K system. Dirty filters? They shut down your system. Skipped service