Where is the blower motor fuse and relay?

Under the instrument panel, look under the glove box. On the right side of the fender wall you will find another fuse box. The blower motor fuse is easy to replace.The relay is located in the fuse panel (power distribution box) located in the engine comaprtment. Below is a picture of the location of that panel and a diagram of the fuses and relays. The blower motor relay is the one located in the number 55 position.

Which fuse is the blower motor fuse?

What relay controls the blower motor?

The blower motor relay controls the current used to power the blower motor, and is subject to the constant on and off switching.

Does a blower motor have a relay?

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.

How can I tell if a relay is bad?

You want to feel and listen for any clicks. If you feel and hear clicks, the relay works on one side – the side with the energizing circuit and coil. However, if there was no sound from the horn, the relay has a problem along the contact circuit.

How do I test a blower motor 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.

Where is the blower motor control module?

It's located inside the dash, often on the opposite side of the steering wheel or inside the engine compartment on the firewall. A blower motor resistor or a blower motor control module is the part that controls the speed of the blower motor.

What happens if blower motor relay goes 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 reset my AC blower?

Locate the reset button on the furnace and press it to reset the furnace. 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.

Where is the fuse for the heater?

Fuses. 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.

What causes heater blower not 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.

What can cause a blower motor to stop working?

In most cases, a blower motor resistor fails due to corrosion or overheating. Sometimes, the mechanical resistance to the motor rotation causes an excessive electric current that can overheat and prematurely damage the blower motor resistor.

What happens when blower motor resistor goes out?

If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored.

Why is my blower motor not working?

Check the Filters and the Vents 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.

What happens if a relay fails?

If the relay fails it will cut off power to fuel pump and ignition system, which will result in a no power, and therefore no start condition.

How do you check if a relay is working?

So, to test this, put the multimeter in continuity mode and while the relay is not activated, connect the leads of the multimeter between the COM and NC terminals. The multimeter should start the buzzer if the relay contacts are okay. Now, energize the relay and test for continuity between COM and NO terminals.

How do I know if my blower motor resistor is bad or blower motor?

Signs of a Bad Blower Motor Resistor Loss of HVAC fan control (total or certain speeds) The fan only works on its highest speed setting. No air coming from vents. Intermittent or inconsistent fan speed.

Where is the blower motor reset button?

Locate the reset button on the furnace and press it to reset the furnace. 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.

Where is the blower motor 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.

How much does it cost to replace a blower motor relay?

The blower motor is operated by an electrically operated switch, called a relay. If the relay fails, the motor's fans will not blow conditioned air into your car. Fixing the relay usually costs around $50 to $80. So, if the blower motor relay fails, you could be left sweating or shivering.

What does blower motor reset button look like?

These blowers can be VERY hot. Step 4: Locate the reset button. This is usually on the side or the back of the blower motor. Often times, this button is red.

Is there a reset button on an AC fan motor?

Look for it first around on the exterior of your machine, especially along the bottom edge near the ground. An AC's reset button is typically red and visible, so it should be easy to spot. If you don't see a reset button on the outside, it could be located inside the unit behind the service panel.

Will a blown fuse cause my 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.

What fuse controls the heat in a car?

The blower fuse is a 40 amp fuse located in the engine compartment's fuse box.

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 know if it's my blower motor or 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.

Why does my blower motor keep blowing fuses?

Thus, blown fuses could be a sign of relay issues. Blower motor relays handle a large amount of current. Malfunctioning relays aren’t able to distribute their load properly.

What does a blower motor relay do on a car?

Blown fuses 3. Melted relay The blower motor relay is the electrical switch that is used to supply the power for the vehicle’s blower motor. The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems.

What to do if your blower motor is not working?

Start by checking the blower fuse and HVAC controller fuse. If it’s good, refer to a wiring diagram for your vehicle and conduct these tests: Disconnect the electrical connector at the blower motor and jumper power and ground to the motor, bypassing all the speeds controls.

How does a blower motor resistor work?

In one design, the car maker supplies battery power to the speed switch, which switches the power to the appropriate connection on the blower motor resistor. In those applications, the motor resistor reduces power for the slower speeds and the blower motor has a permanent ground connection to complete the circuit.