Why does my blower motor intermittently fail?
A lot of blower motor intermittent (and finally complete !) failures are due to the build up of dirt and pitting on the commutator of the motor. To get at the commutator.
What happens when a blower motor relay wears out?
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, and is subject to the constant on and off switching. Over time, it can eventually wear out.
Why does my Vauxhall blower motor run at different speeds?
This is the electrical component which enables the electric fan motor to run at different speeds. WD40 will not help at all I’m afraid.
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 are the symptoms of a worn out blower motor?
One of the symptoms of a worn out blower motor is that it can intermittently produce a loud screeching noise when running. How to test a blower motor? If the blower motor doesn’t work at all, the blower motor itself must be tested first. Typically it’s done by measuring the voltage at the blower motor connector when it’s turned on.
What does it mean when a blower motor resistor fails?
In our case the ohmmeter shows open circuit, which means the resistor has failed. Sometimes, a blower motor resistor might fail due to problems with the blower motor itself. This means after replacing the blower motor resistor, check if the blower motor runs freely and doesn’t make any noise.
Where does the power transistor go in a blower motor?
The power transistor has 4 wires: two come from the climate control system control unit, one is the ground, one goes to the negative terminal of the blower motor. The service manual advises measuring the voltage at the blower motor, then if not OK, at the power transistor and so on.
What can cause a / C blower motor to turn off?
My best guess would be that the blower motor may have bad bearings or other issues causing it to draw too much current, causing the overcurrent protection on the motor to kick in and shut the motor off.
Why does my furnace blower wheel not turn?
If the wheel does not turn freely then you probably need a new blower motor because the motor bearings might be dragging the motor down and causing it to over-heat. If the wheel turns freely, I will suggest having the motor run capacitor checked. Some appliance parts places will check capacitors out for free.
Where is the commutator on a Vauxhall blower?
The commutator is the set of copper segments that move round as you spin the motor. The best place to get at it is on the opposite side to the connection socket. You can get proprietry brands of cleaning stick, but you can use fine emery paper. Hold it on with you finger and spin the motor until clean.
Is there a problem with my blower motor?
When the Blower Motor does work, it works great. Can’t seem to put a finger on this problem. Hopefully someone has the answer! Patiently sweating it out while waiting..
If the wheel does not turn freely then you probably need a new blower motor because the motor bearings might be dragging the motor down and causing it to over-heat. If the wheel turns freely, I will suggest having the motor run capacitor checked. Some appliance parts places will check capacitors out for free.
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, and is subject to the constant on and off switching. Over time, it can eventually wear out.
When does my AC blower motor come on?
When it does come on, usually after about 20 minutes of drive time, it blows great. At times it will come on as soon as I crank engine, at times it will not come on at all.
Why does my Ford blower fan not work?
Worked perfect for about 8 months. The third time in the shop, the mechanic wired the blower directly to the battery and it worked fine so he knew it wasn’t the blower motor. He checked electrical continuity through the dash and said it was okay. He thought there could be a loose ground wire along the main branch of wires???
How long does it take for a blower fan to work?
Initially, the mechanic replaced the blower motor and fan worked fine for about 4 months – then stopped again. Next time, the mechanic again replaced the blower motor again and reportedly tightened the electrical connection. Worked perfect for about 8 months.
Why is my furnace blower not working?
One of the most common problems with furnace fans is a bad blower relay . The first thing to do is check the relay or voltage from the board. If no voltage is recorded, you will have to replace the board or the relay. If there is a battery, check if it is working properly. This is another common reason behind faulty blower fans.
Why is my AC blower not working?
A common problem behind an air conditioner blower not starting includes overheating, which keeps the motor from running. Let your air conditioner rest and cool down for a while before trying to turn it on again; if the motor works at that point, overheating is probably the problem.
Why would a car fan not blow?
Problems like a fan clogged with dirt, a dead motor, a loose fan belt or a stuck wheel can all cause your blower to not work properly. These problems can keep the blower fan from blowing enough air out of your vents to keep you cool.