Posts Tagged: Blower motor resistor
Symptoms of a Bad Blower Motor Every Driver Should Know
The Biggest Warning Signs of a Bad Blower Motor Quick Summary — What You Need to Know About Bad Blower Motor Symptoms The most common blower motor symptoms are: weak airflow, noisy operation, or a fan that won’t shut off. Blower motor symptoms typically develop gradually—until one day, airflow disappears altogether. Understanding what those symptoms look like, how the blower motor and controller operate, and how they fail will help you avoid freezing in winter or overheating in summer. In this article, I’ll walk you through the most common blower … Read More
Why Your Blower Motor Resistor Keeps Burning Out
How to Stop Repeat Blower Motor Resistor Failures Quick Summary If you’ve replaced your blower motor resistor multiple times and it keeps failing, you’re not alone. The most common reason a blower motor resistor keeps burning out is excessive current draw from a worn-out blower motor. Other causes include poor electrical connections, corrosion at the resistor connector, and even water or debris entering the HVAC ducts. Article As a former ASE-certified technician, I’ve seen countless cases where drivers replaced the blower motor resistor multiple times, only for it to fail … Read More
Blower motor only works on high speed
Why a Blower Motor Only Works on High Speed Quick Summary If your blower motor only works on high speed, the most likely cause is a failed blower motor resistor. In most vehicles, the high-speed setting bypasses the resistor entirely, so the fan can continue operating on high even when the resistor fails. Other possible causes include: • A bad blower motor control module • A damaged connector • Excessive blower motor current draw, • A faulty fan speed switch • Wiring issues. Diagnosing the problem usually involves inspecting the … Read More