Why is my blower motor only working at high speed?

The first thing that needs to be determined is the type of noise that is present and the possible sources. Rattling or knocking noises while… The blower motor only working on high speed is a common symptom of a failing blower motor resistor; but the fact the radio stopped working at the same time is unusual.

What are the symptoms of a failed blower motor resistor?

Blower motor resistor problems. Problems with a blower motor resistor are common in many cars. The most common symptom of a failed blower motor resistor is when the heater fan only runs at high speed and doesn’t work at low speeds.

What kind of motor does a variable speed blower use?

Variable speed blower motors don’t use a blower motor resistor. Instead they use a blower motor speed control or a power transistor. Variable speed motors are most often used in vehicles with automatic climate control.

What should I do if my blower motor stops?

Replace blower motor. If you have a variable speed blower motor, replace the blower motor speed control module. If you have a three or four speed blower motor, remove the blower motor relay. If the motor stops, replace the relay. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period.

Why is the resistor not working on my blower?

Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.

When do you Know It is time to replace your blower motor?

If you notice your blower motor is not functioning on certain speed settings, has a burning plastic smell, or the blower continues to run with the ignition in the off position, it may be time to replace your blower motor. Here are some steps you can take to confirm whether or not this replacement is necessary.

What to do if your blower is not working?

The very first step you need to take is getting a scan run on the computer. Take your car to a technician or a local parts store and have them scan the car. They will give you a list of… Hello there, thank you for asking about your 1998 Oldsmobile LSS.

How can I tell if my blower speed switch is faulty?

Test for power at all the blower speeds by moving the blower speed switch through all positions. A faulty resistor loses power at different positions on the switch. High blower speed has direct power to the motor from the switch. If there is no power indicated on high blower speed, the problem is most likely the switch or the fuse.

How do you test the power of a blower motor?

Unplug the blower motor and test for power using the 12-volt test light in the same manner as explained in Step 1. Testing at the motor itself eliminates the possibility of confusion caused by complicated electronic blower controls found in Electronic Climate Control systems.

How to prevent repeat failures of blower motor fan?

Plus – Tips To Prevent Repeat Failures! If playback doesn’t begin shortly, try restarting your device. Diagnostic training videos and content hosted by ASE Master and L1 Certified Technicians. Our goal is to teach you ways to be quicker and more efficient in your diagnosis by implementing different techniques and tools.

How is a blower fan connected to a battery?

A blower fan is connected to the negative battery terminal (also called ground) on one end and to the positive battery terminal through a blower motor resistor on the other end. The blower resistor is connected in series to the blower fan motor.

Why is the blower motor not working on my car?

My car has an automatic transmission. Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.

How does a high speed blower motor work?

In the highest fan speed state, the blower resistor is bypassed completely and the fan is effectively connected directly to the car’s battery, allowing maximum current to be supplied to the blower motor.

Why does my Ricks free auto blower motor not work?

A clogged cabin air filter reduces airflow through the ducts, increases current draw on the blower motor and can cause blower motor resistor overheating and premature failure. If you replace the resistor and it burns out again, check the current draw on the blower motor.

Which is the best high speed turbo blower?

Excellent transmit design with impeller run at 13000 ~ 28400 rmp, Belt Drive, Oil free operate, blow-off is clean and without pollution. Master energy-saving core technology, saving 30% of electricity than traditional blower, High speed, high power, high efficiency Bower.

What can you do with a high speed centrifugal blower?

High Speed Centrifugal Blower, Drying Beverage Can Bottles, Hardware & Auto Parts, Cleaning and Dedusting Iron & Copper. Excellent transmit design with impeller run at 13000 ~ 28400 rmp, Belt Drive, Oil free operate, blow-off is clean and without pollution.

Why does my blower not work at high speeds?

Blower works on slow speeds, but not on high speed. Check for bad fuse or bad high speed relay. Swap the high speed relay with another relay with the same part number. Also, check the fuse for the control side of the high speed relay. Make sure the ground side of the high speed relay is working. Blower works on some speeds but not others

How does a half speed blower motor work?

So a half speed driver request will result in the blower motor controller pulsing the ground connection off twice as often as when the fan is running at full speed. Carmakers use these three common wiring methods to supply power and ground to the blower motor in a manual system using a blower motor resistor.

Why does my a / C front blower stop working?

No matter how many times (or position) the fan speed knob is moved, the front blower motor fails to respond. A/C system can be turned off and on multiple times, but the front blower fails to respond.

Is the front blower on my win still working?

It’s been about six weeks since we replaced the WIN. To clarify, the rear blower always works. The front blower will come on and, if its going to quit, it will cycle off, back on and then off until I restart the van. It has quit at every speed-no one speed more than any other.

Why does my front blower not work in my Dodge Grand Caravan?

I have been dealing with this issue for over a year. 2008 Dodge Grand Caravan. Front blowers don’t work when back ones do. AC is still cooling. Turn van off, restart and everything works again. Maybe for minutes, maybe for days or weeks. Four different mechanics and dealers have looked at the problem.

Is it normal for an air conditioner to stop blowing air?

Unfortunately, just like any other appliance, air conditioners will malfunction. No one likes it when their air conditioner stalls in the middle of summer but before you pay an HVAC company to look, you can troubleshoot small issues on your own.

Why does my Ford PowerStroke blower quit working?

Well the “NEW” blower motor is as weak, or weaker, than the original 13 year old Ford blower. That isn’t the problem. It’s been on the truck for 1 day and it’s going back to RockAuto. Today in the 90 degree heat, it decided to just quit spitting anything out of the vents altogether.

How much does a blower motor cost on a Ford PowerStroke?

It looks like a blower motor is about $35 from the local parts place, but you have to swap the plastic fan which is probably easier said than done (I picture myself prying on it and destroying it).

Is the a / C blower motor still original?

It just doesn’t cut it in the Georgia summer heat! – the blower motor turns just fine and doesn’t seem to have a lot of resistance to it, although the plastic fan portion itself is still labeled 2/99 so it is original. I’m not sure if the motor itself is original.

Why does my Ford F-150 blower only blow on high?

Please try again later. If your 1997-2003 Ford F-150 A/C – heater fan only blows on high or doesn’t blow at the lower speeds, you most likely have a failed blower motor resistor. You could pay up to $400 to have a shop or the dealer replace it for you but you can do it yourself for as little as $20!

How much does it cost to replace a blower on a Ford F-150?

The average cost for a Ford F-150 Blower Motor Resistor Replacement is between $78 -$87. Learn More Fan only works on setting number 3. Blower only works on high setting.

How to fix blower resistor on Ford F150?

FORD F150 BLOWER RESISTOR 1997-2003 FIX! Only blows on high – $20 (Short version) – MECHANICAL KID – YouTube FORD F150 BLOWER RESISTOR 1997-2003 FIX! Only blows on high – $20 (Short version) – MECHANICAL KID If playback doesn’t begin shortly, try restarting your device.