When most homeowners think about HVAC problems, they think about summer. The air conditioner can’t keep up. The house won’t cool down. Energy bills spike. That’s usually when the panic sets in. But here’s the truth most people don’t hear often enough: HVAC systems rarely fail suddenly. Most breakdowns don’t start during summer heat waves — they start quietly months earlier. Winter is one of the most strategic times to pay attention to your HVAC system.