What happens when a blower motor resistor goes bad?

What happens when a blower motor resistor goes bad?

If you try to increase the air pressure and you feel no difference in the pressure blowing, then your blower motor resistor may be failing. A damaged blower motor resistor will work on one fan speed which may not be enough to keep the inside of your car cool or warm enough.

Is there a fuse for the heater blower?

The blower motor is powered by a fuse-like device called a relay. If your heater or air conditioner does not blow air through the vents, this could indicate that the blower motor fuse has probably blown. While replacement is easy, the exact location of your blower motor fuse may vary from vehicle to vehicle.

What causes a heater fan to stop working?

If little air is coming through the vents (hot or cold), then it could be because the blower motor for the fan or a switch or resistor that controls fan speed isn’t working. Another cause might be that the electronically controlled “blend doors” that direct air flow are stuck or broken.

Is there a fuse for the blower motor?

Many vehicles have two fuses for the blower motor, one in the interior fuse block and the other under the hood. The blower motor is usually under the dashboard on the passenger side.

How do you tell if it’s the blower motor or resistor is bad?

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 the highest speed setting (4 or 5) and doesn’t work at low speeds. In some cars, a failed blower motor resistor can cause a heater fan to stop working completely.

How do I know if I need a blower motor or a resistor?

Typically, if the fan will work on some speeds but not on others, the resistor is suspect. Okay, let’s say there’s no melting going on, but your fan doesn’t work on all speeds. Typically, if the fan will work on some speeds but not on others, the resistor is suspect.

Where is the blower motor relay fuse located?

The blower relay is located near the front of the fuse block and is labeled “Blower.” Inspect the center of the relay. If the metal rod inside is broken, the relay will need to be replaced.

How do I know if my heater fuse is blown?

You may also need to use your multimeter to check if your fuses are blown. You can quickly determine by checking resistance with a multimeter. A good fuse will have nearly zero ohms of resistance, if the fuse is blown there will be no reading.

Can I drive my car if the fan is not working?

As such, you should never drive your vehicle if the cooling fan isn’t working even though you can. If the radiator does not have cool air blowing on it constantly, it will overheat eventually, so you’d need the perfect combination of weather and traffic to drive effectively without a radiator fan.

How do you test a fan motor?

How to Test Your AC Fan Motor

1. Check the power. If you suspect the fan motor is bad, the first thing you should check is the power to the motor and the power to the air conditioning unit.
2. Check the windings. Next, check the windings of the fan motor for an open or a short.
3. Inspect the capacitor.

How do I reset my blower motor?

How to Find and Reset your Furnace Motor Blower

1. Step 1: Turn off the power to the furnace.
2. Step 2: Remove the blower compartment cover.
3. Step 3: Make sure the blower is completely cooled off.
4. Step 4: Locate the reset button.
5. Step 5: Press the button in (assuming that this is your issue and that the button has popped).

Where is the heater resistor?

The heater blower motor resistor is often found beneath the dashboard. It is located in the heater and air conditioning compartment. It’s connected to the air conditioning system, where it can adjust the speed of the blower motor fan. It can also be found behind the glove box of some vehicles.

Why is my Saab 9-3 heater not working?

Saab 9-3 Heater Is Not Working Repair Symptoms Blower Motor Replacement When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will be dramatically decreased. This

How do you fix a fan that won’t turn on?

WD-40 is probably the answer. If this does not help, you need to change the fan motor. Open the bonnet (on the opposite side of the driver position), take out the pollen filter and stick your hand down the back. This will allow you to see if the fan motor is seized.

How to tell if fan is working or not?

Use a volt meter on those two wires and watch the voltage step up from 11.88 volts (Key on Engine off ) fan off to 12.10 volts (Key on Engine off) fan max. Hope this saves someone some time. my 9-3 is suffering from the internal fan working continually.

What is wrong with my 93 Aero?

I have a an 03 (53) 93 aero and had just this problem. This issue is a sticking fan as our friend states but this also burnt out the capacitor which then needed replacing. Saab Reading fixed it but my wallet was 250 pounds lighter. This is not an uncommon problem! Great info received , very usefull, thanks to all.