Think You Know HVAC Troubleshooting? Prove It.A noisy HVAC blower motor may have which of the following mechanical problems?79%Next Correct Incorrect Worn bearings in the blower motor cause grinding or squealing noises during operation. A noisy HVAC blower motor may have which of the following mechanical problems? Refrigerant pressure imbalance Worn bearings Clogged air filter Thermostat malfunction 79%
