Why Does My Swamp Cooler Motor Hum but Not Start?
TL;DR: Why Your Swamp Cooler Motor Hums but Does Not Start Turn the cooler off quickly. A motor that sits and hums can overheat and burn out. Common causes include dry blower bearings, an overtightened belt, a blocked blower wheel, low voltage, or a failing motor. A bad capacitor may be responsible, but only if … Read more
