What causes a blower fan to stop working?
What causes a blower fan to stop working?
This wear can sometime be correlated to an audible ticking or squeaking noise when the fan is operating. When this heater motor stops one of three things has happened the electrical supply has quit, the motor has burned out or the system ground has failed.
What kind of motor does a blower fan use?
A blower motor is a basic 12 volt (DC) medium size electric motor that pulls a respectable amount of amperage (about 15 amps) which in time can burn out and stop working. As the blower motor ages the amperage that it takes to run the motor increases that overloads the electrical system which can cause additional problems.
How do you remove a motor from a blower fan?
While holding the blower motor in place remove the last screw. After all of the screws have been undone grasp the motor and remove it from the housing. This can take some maneuvering so hang in there and be careful not to damage the fan blade (squirrel cage) against the heater plenum.
Since these are mechanical connections the blower switch is making to open and close these circuits, over time and use these contacts become pitted and covered in carbon (from the electrical arching that occurs when the contacts close). When this happens, one or several of the blower fan speeds stop working.
How to test a Ford blower motor switch?
NOTE: See image 4 of 4 to further identify the blower switch terminals. With the blower switch knob set to the M2 position . You should have continuity between 2 and 4 (see image 2 of 4 to identify the proper male spade terminals to probe). With the blower switch knob set to the HI position .
What kind of blower switch does a Ford Mini Van use?
To aid you in further knowing if this tutorial applies to your Ford car, mini-van, pickup or SUV, if your vehicle uses one of the following blower motor switch numbers, this tutorial applies to your vehicle: Airtex/Wells 1S3046. Duralast SW3316. Four Seasons 20046. Motorcraft YH1670. Standard Motor Products: HS333. Contents of this tutorial:
Where does the battery go on a Ford blower motor?
The end result is that your Ford’s blower motor now runs in M1 speed. Battery power is available on terminal 2 of the blower switch connector (YEL/RED wire). This battery power is now diverted to terminal 4 of the blower switch harness connector.
Since these are mechanical connections the blower switch is making to open and close these circuits, over time and use these contacts become pitted and covered in carbon (from the electrical arching that occurs when the contacts close). When this happens, one or several of the blower fan speeds stop working.
How to test the blower motor switch in Ford 4.0L?
CASE 2: All circuits tested had continuity where indicated in the test steps. This is good and is the correct and expected test result that tells you that the blower fan switch (in the A/C-Heater control panel) is NOT defective. Your next step is to bypass the blower resistor using a simple jumper wire.
What causes a bad or failing blower motor relay?
Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. 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…
The end result is that your Ford’s blower motor now runs in M1 speed. Battery power is available on terminal 2 of the blower switch connector (YEL/RED wire). This battery power is now diverted to terminal 4 of the blower switch harness connector.
Why is my blower fan not working on my Ford F 150?
Blower fan not working – 2004-2014 Ford F-150 and other models. Blower Motor Resistor Replacement If playback doesn’t begin shortly, try restarting your device.
What happens if you lose the blower motor relay?
The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Without it, the AC system will not be able to circulate any heated or cooled air. The blower motor relay controls the current used to power the blower motor,…
What causes a fuse to blow on a blower motor?
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 happens if you have a bad blower motor?
The blower motor is the component responsible for pushing air through the vents of your vehicle’s heating and air conditioning systems. Without it, the AC system will not be able to circulate any heated or cooled air.
