Filter, airflow, capacitor, charge, ducts: the sequence that finds the cause without buying parts on guesses.
Diagnosis, repairs, and full systems in published ranges, and the repair versus replace arithmetic.
What clicks, what glows, what proves flame, and the safety lines that come before any repair.
The 5,000 rule, refrigerant reality, and the duct question that changes replacement quotes.
A city up 58.5 percent since 2020 installed its HVAC in waves, and the waves reach repair age in waves. Reading your street's system calendar, and what it does to quotes.