what causes a fan blade to break
Coolant leaks, which result in the system simply blowing warm air into the house. A blown capacitor, which can cause the unit to overheat and break down. A bent fan blade, which can also cause overheating and system failure. A broken motor, in which case the system will not cycle. A damaged power cord, which means the system might not even turn on. A clogged air filter may result in a system breakdown.