How does a 3 speed blower motor work?

Older style blower motor resistor with exposed resistor elements. The blower motor resistor is what’s responsible for giving you three blower speeds. The resistor block contains three different high resistance coils. Think of these coils like a filament in a light bulb.

What to do if your blower motor only works on high speed?

If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode. To repair the problem, simply replace the resistor block. It’s usually located in the ductwork (to keep the coils cool) below the glove box.

Where do I replace the resistor on my blower motor?

To repair the problem, simply replace the resistor block. It’s usually located in the ductwork (to keep the coils cool) below the glove box. Unplug the electrical connector, remove the screws and replace the unit. Replacement blower motor resistor blocks are usually available from any auto parts store or the dealer.

What happens when the resistor on a blower motor fails?

The coil resistance causes them to heat up, thereby reducing the amount of voltage that can flow to the blower motor. When a resistor coil burns out, you lose that fan speed. A blower motor resistor can fail in several ways; since many are designed in series, if one resistor fails, you loose speeds 1-3.

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.

Why does my blower fan only work on one speed?

by Lee Sallings. The most common symptom of a faulty blower motor resistor is a blower fan that only works on one speed, usually high. This can be annoying, but troubleshooting is easy. If you start at the blower motor, and check resistance in the circuit, you will find the problem in no time.

How is the speed of the blower motor controlled?

The electronic module that controls the speed of the blower motor is called a blower motor control module. In some cars, the blower motor has only 4 or 5 fixed speeds. In this case, the speed of the blower motor is controlled by a blower motor resistor.

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.

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 is the fuse diagram for a Dodge Dakota?

Fuse box diagram (fuse layout) and assignment of fuses and relays Dodge Dakota (1991, 1992, 1993, 1994, 1995, 1996). The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of damage caused by electrical problems. To check a fuse, look at the silver-colored band inside the fuse.

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.

How do you fix a blower motor on a Dodge Dakota?

It requires two actions to release it from the blower motor resistor. On the Dodge Dakota I worked on, I found a red lock tab that required removal. Then you depress a black locking tang and hold it in while you wiggle the connector free.

Are there any problems with the Dodge Durango blower?

Note that Chrysler evaporator core problems continue to grow and that AC part is close to the fan motor. Although it was the Dakota that tipped me off to this problem, I can see the Dodge Durango from 2001 through 2006 uses the same part number and wiring harness repair kit.

Why is the motor on my Dodge blower not working?

However, lets still call it a bit of a struggle, because the plastic from the connector had melted and fused to the plastic of the resistor bridge. In addition, when you attempt to pull the wires in an out of the plastic connector you’ll find them retained with a locking mechanism.

Is there a problem with my Dodge Dakota?

My neighbors 01 Dodge Dakota pickup truck was having an HVAC blower motor issue. It worked on high only and sometimes not at all. When I typed a description of the problem in my favorite search engine, the number one result said.

Why does my blower only work on high speed?

Where is the blower control switch on the dashboard?

The blower control switch on the dashboard controls the circuit flow of the blower motor to adjust the voltage from low, to medium, to medium-high, to high. When on high, the circuit bypasses the blower resistor.

What happens if the blower motor only works on high speed?

In other designs, the failure of 1 resistor means you lose only one speed. However, most car makers bypass the blower motor resistor completely when you move the fan speed switch to high. If your blower only operates on its highest speed, chances are you have the series type of blower motor resistor. This is the most common failure mode.

What causes a blower fan to not work?

When this happens, you may notice that you will not feel anything blowing out of the vents at all. This may also cause the blower motor to work intermittently. 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.

How many HVAC blowers are left in stock?

Only 17 left in stock (more on the way). . Only 16 left in stock – order soon. . Only 6 left in stock – order soon. . . Only 2 left in stock (more on the way).

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).

How many volts does the blower motor get?

I have also verified that the blower motor is getting 14.27 volts at the blower motor plug.

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.

How does a 3 speed blower motor work?