Can You Troubleshoot These Common HVAC Problems Like a Pro?Share:FacebookPinterestTwitterMailThe air handler vibrates loudly during operation. What’s a common cause?92%Next Correct Incorrect A misaligned or unbalanced blower wheel creates vibration. The air handler vibrates loudly during operation. What’s a common cause? Faulty limit switch Weak capacitor High refrigerant charge Blower wheel imbalance 92%