Chevrolet Avalanche 1500 blower resistor repeatedly failing, possibly due to rust or vacuum leak on Chevrolet Avalanche 1500

Some Chevrolet Avalanche 1500 owners report experiencing repeated blower resistor failures, which may be attributed to rust or corrosion affecting electrical connections. These issues can lead to poor performance of the blower motor resistor. Additionally, some owners have identified vacuum leaks in the HVAC system that disrupt airflow, causing the blower motor resistor to work harder and potentially fail prematurely. Symptoms that indicate a faulty blower motor resistor include the blower motor being stuck on one speed, inconsistent airflow, or complete failure of the blower motor. To diagnose the root cause of these failures, conducting an amperage test on the blower motor may be helpful. Furthermore, checking the cabin air filter for clogs is a simple step that owners can take before seeking professional assistance for blower motor resistor issues.