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My ac/heater fan stopped blowing. There were no previous problems with the ac. How can I tell if it's just a blower fuse or the fan/motor itself. And where is the blower motor located?
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25AMP FUSE BLOWS?
PULL THE AC COMP CLUTCH WIRE, THEY LOVE TO SHORT.
THE FUSE RUNS CLUTCH AND BLOWER SO I CALL CLUTCH ELECROMAG SHORTED
SAY WARM !!!!!
and sure doing that kills AC defrost mode. no clutch.
That's a heater/A/C blower motor ! What make , model an year vehicle ? Doesn't it work in any speed position ? Fuse , relay , control head , resistor or the motor itself could be the problem .There are videos on you tube on testing blower motor circuit .
It's likely your blower motor is faulty. When it stops, so does everything else. It's located under the glove box. The most common cause of a fault is simply a loose red wire connection going into the blower motor itself. A simple squeeze with the pliers can solve that problem. If it's not a bad connection then your blower motor itself is faulty and can be bought on ebay and replaced easily at home.
The only other fault you may have is your bitron unit or temperature sensor, but these would not cause your fan to stop blowing. All the best
when a fuse keeps blowing it can only be one of two causes. either the consumer is loading the circuit too much due to a bearing problem or rusty component, or there could be a short circuit to ground. disconnect the blower motor plug connector and turn your a/c on like normal. if it blows the fuse again, replace the blower fan motor. if not, start checking the wiring for any exposed copper that might touch the ground-negative.also inspect all the plug connectors for water damage and corrosion.
The three most common problems for heater fans are
Burned-out blower motor resistor. This is usually located on the engine side of the firewall. Sometimes one section of the resistor is burned out but others are still good, so the blower only works on the highest speed settings. If you have a burned-out resistor, check the blower bearings to make sure they are not stiff and causing the motor to draw too much current.
The blower is actually working, but either the intake vent is plugged (I've seen vehicles with the heater core completely blocked by dirt, leaves and insects that came in through the vent), or the heater door is stuck closed.
The motor bearings have gone bad (see # 1). This can cause the fuse to blow, although the resistor usually fries first.
I'm not sure how your car's cabin environmental control system is fused. Check any fuse that might apply, such as Vent/AC, HTR, FAN, etc. Generally you can identify the state of a blade-type fuse by inspection without removing it. If you have a blown fuse, check the blower motor before wasting money on a new fuse that will probably blow. Like any fan, it's supposed to turn easily, and there should not be any roughness or side-slop in the bearings.
Test the motor first, The wire to it is a hot positive wire and the motor's housing is the ground. If that works ok next check the resistor to see if its burnt out. Did you look at your fuses first?
Your fan seems to be drawing way too much current, common with fan motors of all kinds when they are going bad. It will still blow, but hot wires and blown fuses in the normal circuit indicate you have an excessive load in the circuit. Fan motors create this condition regularly, but are often ignored since they are "still blowing."
Here's a cheap, easy way to test my theory:
Try a new fuse, the proper amperage, but leave the blower motor unplugged at the blower itself. That will tell you in a few rides if the blower was the culprit. (Which it most likely is.) I bet your #20 fuse will stop blowing and no more smoking pink wires! Hope this helps. Remember, blower motors are cheap, traffic tickets and dash fires are not. The blower motor draw is the logical thing wrong with this picture. Good LUCK! TT
Check your fuses.If you have a test light, unplug the blower motor, start the car, turn the fan on, if you have power to the blower plug, the blower motor is bad. If no power, if it's not a fuse, check the blower motor resistor. Should be mounted right next to the blower motor. It is inserted into the evaporator box
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