Why is the blower in my car not working?
Sophia Koch
Updated on June 22, 2026
Heater Blower Motor Resistor. 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.
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Similarly, you may ask, what are the signs of a bad blower motor resistor?
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.
Furthermore, what causes a heater fan to stop working? A blown fuse might just be the reason your car heater fan is not working. Check for blown fuses and replace them to restore normal functionality. Also a faulty alternator could make the blower motor stop working, leading to fan failure, when the blower motor stops is rendered dysfunctional.
In this regard, why is my car heater not blowing air?
If the heater is broken because it's not blowing any air at all, it's likely due to a faulty blower motor or electrical connection. If you're able to determine that the blower motor is receiving power, then the blower may have burned out.
Where is the blower motor fuse?
Locate the fuse panel just beneath the dashboard on the driver side of the car. Remove the screw securing the fuse panel cover and remove the cover.
Related Question AnswersHow do you know if a resistor is bad?
Set a digital multimeter for "ohms." Set an ohms range that is equal to or higher than the value of the resistor to be tested. Touch the red lead from the meter to one side, and the black lead to the other. Resistors do not hold a polarity, so it doesn't matter which side gets the red or black lead.How do you test a blower motor resistor?
Place one lead of the Ohmmeter on terminal 1 of the resistor. Place the other lead on terminal 2 and check against specifications. If this circuit is open, showing infinity on the Ohmmeter, the blower resistor must be replaced. Move the lead from terminal 2 to terminal 3 and check this reading against specifications.How do I know if my blower motor switch is bad?
Symptoms of a Bad or Failing Blower Motor Switch- Switch only works on certain settings. One of the first symptoms commonly associated with a bad or failing blower motor switch is a switch that only works on certain settings.
- Switch is stuck. Another symptom of a bad or failing blower motor switch is a switch that is stuck, or frequently gets stuck.
- Broken knob.
Why is air not coming out of my vents?
Low Air Flow Through Vents In House And Other AC Problems. The most common cause of low air flow through the vents in your home is blocked or dirty AC filters. If your AC is running but is not cooling the house properly, you could be the victim of a variety of issues.How do you know if your AC relay is bad?
Signs of a Bad or Failing AC Compressor Relay- Inconsistent cooling. The AC compressor is powered by the relay.
- AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all.
- No cold air.
How much does it cost to fix a car heater blower?
The average cost for a blower motor replacement is between $364 and $394. Labor costs are estimated between $86 and $109 while parts are priced between $278 and $285.How much does it cost to replace a thermostat in a car?
The average cost for a thermostat replacement is between $217 and $253. Labor costs are estimated between $117 and $149 while parts are priced between $100 and $104. Estimate does not include taxes and fees. When would you like to drop off your car?Is there a fuse for the heater in my car?
The heater itself has no fuse, because it's not electric. The heater in a car is a small radiator which has engine coolant running through it. When air is blown over the heater core, heat generated by the engine and carried by the coolant is transferred to the moving air and heats the car.How much does a blower motor cost?
How much does a furnace motor replacement cost? On average nationwide, a furnace blower motor replacement costs $400-$600, including parts and labor. A single-speed blower motor costs around $450 to replace while a variable-speed motor costs $600+.How do you check a car thermostat?
Start your car's engine and allow it to idle. Look through the radiator filler neck to see if the coolant flows. At this time, it should not be flowing as your car has not reached the operating temperature to cause the thermostat to open. If you find the coolant is flowing, it means the thermostat valve is open.How much does it cost to fix a heater core?
Replacing the heater core can be an expensive job, and usually costs between $564 – $927 for parts and labor. The parts aren't particularly expensive, normally costing $80 – $234, but the location of the heater core means that labor costs tend to be quite high.What are the symptoms of a bad thermostat?
There are several common symptoms associated with a bad or failing thermostat that will alert you that service is due.- Temperature gauge reading very high and engine overheating.
- Temperature changing erratically.
- Coolant leaks around the thermostat housing or under the vehicle.
