Why is the blower on my car heater not working?
If the blower on your car's heater is not working, it could be due to a few common issues. The most likely causes are a faulty blower motor, a problem with the blower motor resistor, or a blown fuse. Let's explore these potential problems in more detail.
Faulty Blower Motor
The blower motor is responsible for circulating the warm air from the heater core throughout the cabin of your vehicle. If the blower motor has failed, it will prevent the heated air from being distributed, leaving you with no airflow from the vents. This could be due to a mechanical issue with the motor itself, or an electrical problem, such as a bad connection or a short circuit. To diagnose a faulty blower motor, you'll need to test it with a multimeter to check for proper voltage and current draw.
Blower Motor Resistor Issue
The blower motor resistor, also known as the fan speed resistor, controls the speed of the blower motor. If this component fails, it can prevent the blower from operating at all or limit the airflow to certain settings. Symptoms of a bad blower motor resistor include the blower only working on high speed or not working at all. You can test the resistor with a multimeter to determine if it needs to be replaced.
Blown Fuse
Another common cause of a non-functioning blower is a blown fuse. The blower motor is typically powered by a dedicated fuse in the vehicle's fuse box. If this fuse has blown, it will cut off power to the blower motor, preventing it from running. Checking and replacing the appropriate fuse is a simple first step to troubleshoot a non-working blower.
If you've checked the blower motor, resistor, and fuse, and the issue persists, there may be a more complex electrical problem in the vehicle's wiring or climate control system. In this case, it's best to have a professional mechanic diagnose and repair the issue.
Why is my car heater blower not working?
If the heater isn't blowing hot air at you when you turn the system on, the blower fan might have a problem. Either it's not getting electrical power or, more likely, the motor itself has simply burned out. A blower motor in an older vehicle is likely to burn out over time, and may need replacement.
Why is my car fan blowing but no heat?
What to Do: Check the coolant level and top it off if necessary. Inspect the thermostat and replace it if it's not functioning. Have the heater core checked for clogs or leaks. Test the blower motor to ensure it's working properly. Adjust the climate control settings and check for any obstructions in the vents.
What would cause a blower not to work?
One of the most prevalent factors that can cause a blower motor to stop working is a blown fuse. A fuse prevents electrical circuits from an excessive flow of current that may run in them. Over time or due to any sudden surge, it might blow the fuse and cut power to the blower motor.
Can you drive with a bad motor blower?
If your defroster does not clear your windshield well, it could be a sign of a faulty heater blower motor. This can make it difficult and unsafe to drive, so it's essential to have a professional mechanic make any needed repairs as soon as possible.
How do I know if my car heater blower is bad?
Another reason why you may hear strange noises could be due to an old or damaged bearing. The second symptom is a blown fuse.
How do I reset my heater blower?
How Do I Reset the Blower?
- Turn off the circuit breaker powering your HVAC system.
- Unscrew the blower cover.
- Give the blower time to cool down completely before proceeding.
- Push the reset button (typically a red button behind the blower motor).
Does heater blower have a fuse?
If the fan doesn't work, before pointing the finger at the blower motor, check fuses for the motor to make sure they're still good. 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 much does it cost to fix a car heater blower?
The average cost for a Blower Motor Replacement is between $342 and $362. Labor costs are estimated between $68 and $86 while parts are priced between $274 and $276. This range does not include taxes and fees, and does not factor in your unique location.
Why is my blower turning on but no heat?
This can be caused by a couple of possibilities. It's not that you're blower is out of sync, it is either going bad or if this is an older furnace with a fan-limit switch, it is cooling down the heat exchanger too fast (or the unit is underfired) and the fan switch is turning it off.
