Though it’s worth pointing out that many modern vehicles are using more advanced solutions nowadays, often relying on an electronic control module to regulate fan speed. That’s where the blower motor resistor comes in-and it works great for this sort of thing. It’s either on or off, so controlling the flow of electricity into the blower motor is how you alter the fan’s speed. You need a blower motor resistor here because, electrically speaking, your blower motor fan is a pretty dumb device. If you really want to understand how resistors work in an electrical circuit, learning about Ohm’s Law is a great place to start. By clicking the fan speed knob from one setting to another, you’re changing the path the electricity takes through the blower motor resistor on its way to the blower motor. This is how you’re able to alter the fan’s speed-more resistance means the fan won’t spin as fast, which results in less air (hot or cold) being circulated around the cabin. In simple terms, a blower motor resistor is an electrical component that can block (resist) the flow of electricity (current) into the blower fan motor. (Image/OnAllCylinders) What is a Blower Motor Resistor? Our 2004 Nissan Sentra HVAC controls are delightfully basic, and when we lost the fan’s “2” speed setting while all others worked fine, we instantly suspected the blower motor resistor was toast. That quick little bit of troubleshooting told us that the heater core was good and that the blower motor had power-the fan just wouldn’t work at the “2” fan speed.Ī textbook case of a bad blower motor resistor. Conversely, twisting the knob all the way to the heater’s highest “4” setting was tantamount to opening the doors to 765’s firebox. Momentarily perplexed, we turned the fan down to “1” and the fan began working at its lowest speed setting, like normal. Once we were nice and toasty, we dialed the fan speed knob back down to the “2” position, which is when we noticed the fan wasn’t blowing anything at all. Not thinking too much about it, we turned the heater knob up to “3” and the vents started kicking out plenty of hot air. It was a bitterly cold day and we noticed that our vehicle’s cabin was still pretty chilly, even after a few minutes on the interstate with the HVAC fan set at its “2” speed setting. It all started during our drive to check out the Cavalcade of Customs in Cincinnati, Ohio. This particular OE one (left) retired after close to 20 years on the clock. While pretty reliable, they won’t last forever. A blower motor resistor is the electric component that controls your vehicle HVAC system’s fan speed.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |