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
.
Is there a fuse for the blower?
The blower motor pushes the warm or cold air through your vehicle's ventilation system. 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.
How can you tell if a blower 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 fuse blows again, check for loose circuits.
Where is the blower motor fuse and relay?
The blower relay is
located near the front of the fuse block and is labeled “Blower
.” Inspect the center of the relay. If the metal rod inside is broken, the relay will need to be replaced.
Where is the blower motor relay located?
The blower motor relay is generally located in
the under-hood fuse box or in the under-dash fuse box
. A blown fuse can mimic relay failure.
Which fuse is for the blower motor?
To protect the blower motor power circuit,
a 20-, 25- or 30-amp fuse
is usually located in the fuse panel under the dash. The rating of the fuse will depend on the vehicle application and how much power the blower motor requires at full speed.
How do you check a blower motor fuse?
Locate the blower motor fuse, likely a 30 or 40 amp, it may be marked on the fuse box cover or in the driver's manual.
Use a test light or volt meter
to check for power at the blower motor fuse with ignition and blower motor on. Fuse boxes contain lots of relays, many are identical and can be interchanged.
What happens when 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.
What are the signs of a bad blower motor?
- Weak airflow. This is one of the first signs of a bad blower motor that people tend to notice. …
- Noises. Have you noticed any unusual noises coming from your vehicle's HVAC system? …
- Smoke or smells.
Why is my blower motor not working?
In a situation where the motor doesn't work on any speed, the most likely causes are: a
blown power supply fuse
, a bad motor ground connection, bad motor speed control module or a failed motor. On all systems, a failed blower motor is least likely. Start by checking the blower fuse and HVAC controller fuse.
How do I know if my blower 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.
Where is the fuse for the engine cooling fan?
The cooling fan relay is normally located in either
the underhood fuse and relay center
or mounted to the electric fan assembly behind the radiator.
How much is a blower motor relay?
Blower Motor Relay Replacement Cost – RepairPal Estimate. Labor costs are
estimated between $37 and $46 while parts are priced at $37
. This range does not include taxes and fees, and does not factor in your specific vehicle or unique location. Related repairs may also be needed.
How do you 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.
How do you test a blower switch?
Blower Motor Resistor Testing
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.
