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 blower fan?
Fuse Protection 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.
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.
How do I know if my blower motor fuse is bad?
If you hear that the blower motor is operating but don’t feel any air flowing through the vents, the problem is with the airflow controls [source: RepairPal]. If the blower motor isn’t running you should: Use voltmeter or ohmmeter to check for a blown fuse.
Where is the fuse that controls the AC?
Where is the AC fuse on most HVAC systems? They’re typically in the unit’s control board. This board can often be found behind an access panel on the unit’s lower compartment. While some panels must be unscrewed to access the control board, others have clips that are lifted to remove the panel.
Why is the AC in my car not blowing?
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.
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.
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.
What relay controls 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.
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.