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.Always use a replacement fuse with the same amp rating as the original. If a new fuse blows as soon as the blower is turned on, the heater circuit or motor may have a short that should be investigated. If the fuse lasts a while and then blows, the fan motor is probably running hot due to worn brushes and/or bushings and should be replaced.
What fuse is for the heater blower?
Where is the blower motor heater 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.
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 fuse is for the heater blower?
Where is the blower motor heater 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.
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.
Where is the fuse for the fan blower?
Under the instrument panel, look under the glove box. On the right side of the fender wall you will find another fuse box.
What happens when a 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.
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.
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.
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.
What fuse is for the heater blower?
Where is the blower motor heater 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.
How do you know if your heater relay is bad?
If you have a faulty blower motor, you may experience low airflow from the vents, even when the fan is on high. There will be no air coming from the vents if your fan isn't working due to a bad blower motor resistor. Blown relay circuit fuses or melted relays are more serious signs of a bad blower motor relay.
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.
Why is my blower fan not working?
If you see or hear the fan turn on, your blower motor is not the culprit. If the fan does not start, you have a wiring issue (circuit breaker trips) or motor problem (circuit breaker does not trip). While your thermostat may be at fault, only an HVAC technician can diagnose and remedy the issue correctly.
How much does it cost to replace a blower motor?
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.
Where is the heater blower resistor located?
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.
What happens when a 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.
Where is the blower motor switch located?
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 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.
What controls the blower motor on the furnace?
A fan limit switch is a component of a furnace system that determines when the furnace blower assembly for hot air turns on and off. Essentially, this means that it determines when the hot air should be blown through your ventilation system. The fan limit switch also has two other functions.
Where is the fuse for the heater fuse?
the heater fuse/relay is behind the kick panel on the p/s of the car (kick panel is the panel under the dash and between the door and firewall) also while you are down in that area check to make sure the blower motor is getting voltage aka bad blower motor) I think it's actually a 30A circuit breaker instead of a fuse.
What should I do if my heater fuse is blown?
Replacing a thermal fuse. If you have diagnosed a faulty heater resistor (not the electronic kind), looking roughly similar to the one shown here, it's most likely just the thermal fuse that has blown. Replacing the fuse is cheap and easy. Stage 1 - Investigate. If your heater blower is totally dead, do check your fuses first.
Why is my heater blowing hot air from the blower?
faulty Heater Blower? Replacing a thermal fuse. If you have diagnosed a faulty heater resistor (not the electronic kind), looking roughly similar to the one shown here, it's most likely just the thermal fuse that has blown. Replacing the fuse is cheap and easy.
What should I do if my heater blower is dead?
If your heater blower is totally dead, do check your fuses first. For safety, disconnect the battery first and make a note of the radio code. Locate and examine the Heater Resistor. If you have an ohmmeter, check the thermal fuse (arrowed).
Below you will find two interesting articles on a similar topic 👇
How do I know if my blower motor fuse is bad?Do heaters have fuses?
