Posts Tagged: blower motor controller failure
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 Runs When Car Is Off
What Causes a Blower Motor to Run After the Car Is Off Quick summary When a blower motor runs when the car is off, the problem is almost never the fan motor itself. In my experience, it’s usually a failed electronic blower motor controller that’s still feeding power or ground after key-off. This is a design quirk, especially on GM and Ford vehicles with automatic climate control—and it can drain a battery overnight if you don’t address it quickly. If you have a vehicle with an automatic climate control system … Read More