
Table of Contents
Which fuse is the blower motor fuse?
To protect the blower motor power circuit, a 20-, 25- or 30-amp fuse is usually located in the fuse panel under the dash.
How do I know if my blower motor fuse is blown?
- Use voltmeter or ohmmeter to check for a blown fuse. If you find one, replace it.
- Start car and see if blower motor works.
- If the circuits are in good repair but the blower motor keeps blowing fuses, replace the blower motor [source: You Fix Cars].
Does blower motor have a fuse?
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.
Can a blown fuse cause heater not to work?
Faulty Wiring or Blown Fuses Similar to your broken HVAC controls, your car’s wiring could be broken or have a short in it. This would mean the heater isn’t triggered when the driver commands it to function. Not good.
How do I know if my heater fuse is 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.
Is there a relay for the blower motor?
In a blower motor, the relay supplies the power that allows the fans to circulate warmed air. Essentially an on/off switch, the blower motor relay’s reactions start and end the heating process in HVAC systems by controlling the flow of current between the power source and the motor.
What would cause my heater blower to stop working?
In short, a dirty blower can cause the heat exchanger to fail. Dirty air filters could also be the reason your heater stopped working. Such filters restrict the airflow and could even worsen existing issues with wrong duct sizing. That’s why it’s paramount to replace filters every three months or so.
Why would blower motor stop working?
Blower motors are designed to circulate air, so they won’t work if there’s no air to move. You should always check the filters and vents surrounding the blower to make sure that the blower isn’t having a hard time working. Look into your air filter’s housing and check the markings on your filter.
What does a blown fan fuse look like?
Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.
What happens if your blower motor relay is bad?
If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current from a bad relay will blow the fuse and cut power in order to protect the system.
How do I test my blower motor power?
Turn off your vehicle, set your multimeter to Ohms, and check for resistance between the blower’s positive and negative terminals. You may also turn the car key to run without starting the engine, put the cooling system at full blast, and check for DC voltage. If none of these produces a reading, the blower is bad.
Why is my car not blowing air at all?
Here are some of the most common causes of why air doesn’t flow out of your vehicle’s vents: Your air intake is clogged, meaning that air isn’t getting in from the outside at all or isn’t circulating properly. There is a blown fuse in the ventilation system. Electrical issues such as a bad relay.
How do I test a blower fan relay?
Connect a test light or multimeter to the ground (black lead). Turn the ignition key to the on position (engine off), and remove the relay. Using the probe, test all terminal sockets in the relay connector. Two of the four should have power.
How do I know if my blower motor is bad in my car?
- Low/no airflow from vents. The classic sign of a bad blower motor is restricted airflow coming from your air vents.
- Strange sounds coming from blower.
- Circuit breaker keeps tripping.
- Hot/burning smell coming from air vents.
Where is my heater fuse?
If your furnace has a fuse, it will probably be located in the control box with the blower. BIf you can’t locate it, the transformer may have burned up and will need to be replaced. Once you’ve located the fuse, check its wires to see if they’re broken or look for signs of discoloration or cloudiness.
Why is my heater not blowing air at all?
Check Your Furnace Air Filter Your filter could be so saturated with dust and debris. In that case, even though the furnace is actually blowing air, your clogged filter is blocking it from making it into your ducts. You should be changing your air filter every three months or so.
Why is my car not blowing hot or cold air?
Faulty heater cores and low or contaminated coolant levels often come hand in hand, and both issues may lead to your engine overheating and your heater not blowing hot air.
How much does it cost to fix a car heater blower?
“A new car blower motor costs about $50 to $100 for the part and $80 to $100 in labor. Add it up and you’re looking at a total charge of $130 to $200 for a new car blower motor.
Why is my car heater not working?
The first thing to do if you’re having issues with your car heater is to check your engine coolant. Make sure to do this when your engine has cooled down to avoid being burned. If your coolant level is too low, there won’t be enough hot liquid in the heater core, resulting in cold air.
What happens when the fuse is blown?
A blown fuse can trigger a circuit breaker, which will knock out the power to a section of your home. Getting to the bottom of the problem will help you get the power back on as soon as possible. If the task of identifying the cause of a blown fuse is daunting, read on to discover nine reasons that a fuse may blow.
How can you tell if a fan relay is bad?
The easiest method is to start the engine and then turn on the air conditioning. If the fan doesn’t engage, there may be something wrong with the cooling fan relay.
Where is the blower motor resistor?
Locate the blower motor resistor. It can be found below the blower motor. In some vehicle’s you need to remove the glove compartment to access the blower motor resistor. Now that you’ve located the blower motor resistor, you’ll now need to disconnect the resistor from the housing and then remove the harness.
How can I tell if a relay is bad?

Where is the blower reset button?
It is usually located inside the blower compartment on the side of the blower motor. Be cautious as the housing may be hot. If the button is popped up, press it down.