Such a Little Part (Climate Control Resistor)
August 25, 2024
You expect your heater/air conditioner to work like it should. You have a control for temperature and one for fan speed. You even have a control for what vents the air comes out of.
Don't be surprised one day if your blower fan develops a mind of its own and starts going crazy. Most of the time, you may find that it starts blowing at full speed, and nothing you do to try to control it does any good. This is what may be happening.
Your blower motor has an electronic component called a resistor. It does what its name says; it offers resistance. When you want the fan to run more slowly, you turn the fan speed down. That resistor accomplishes that by turning its resistance up. When the resistor fails, the power has nothing to slow it and the fan speeds up.
It's a small part and can fail due to age or corrosion. It's usually not an expensive part, either, but it's often found in a location that's not that easy for the technician to get to. That means labor costs will vary depending on the design of your vehicle.
Occasionally, a faulty resistor can cause the blower motor not to work at all or only partially come on. But other things can cause that as well, such as a faulty fan switch or vent control.
This is where a technician's training comes in. Special equipment can track down precisely where the issue is so you can be assured the correct part is being replaced.
It's just not pleasant when the blower motor isn't following orders. Have your service facility check it out so you can be the blower's boss, like it should be.
Charlie's Fast Lube Perryville
701 S. Perryville Ave
Perryville, Missouri 63775
575-517-0022
http://www.charliesfastlubeperryville.com
Need Service?
More articles from Charlie's Fast Lube Perryville
Busted! Air Conditioning (Air Conditioning Maintenance)
January 25, 2026
Your vehicle's air conditioning is something you count on when the weather heats up. But there's bound to be a day when you turn it on and one of these things happens: Only warm air blows out Cold air starts blowing out but then it turns warm on its own It's not blowing air at all It blows smel... More
Do you have a Clue (Get the Most Out of a Service Visit)
January 18, 2026
When you head to the doctor, you probably have it in your mind what you're going to say about why you don't feel good. That way your doctor can use that information to diagnose your problem. You might want to think of that same approach when you take your vehicle in for a repair. Experts say wha... More
Emergency! (Vehicle Emergency items)
January 11, 2026
"I never expected it could happen to me." Countless drivers have said that after they've had an emergency turn their lives upside down. So before that happens to you, let's thinking about planning ahead for an emergency with a few things you should keep in your vehicle. Road flares. If you've ev... More