I was having problems with my blower motor. Sometimes it would work and then it would simply die out. While the fan switch was in the on position, I gave the motor a slap and then it ran again for a short while. I concluded that it was the motor going out and changed it. The thing is, now that I have the new motor installed, it doesn't blow half as hard as the old motor was blowing while it was running. Any Ideas?
Is it the correct motor for you car? Did you make sure that the air box is sealed? Other than that i have no idea....
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I was having problems with my blower motor. Sometimes it would work and then it would simply die out. While the fan switch was in the on position, I gave the motor a slap and then it ran again for a short while. I concluded that it was the motor going out and changed it. The thing is, now that I have the new motor installed, it doesn't blow half as hard as the old motor was blowing while it was running. Any Ideas?
Thanks ya'll,
dao
Have you tried measuring the amperage draw with the fan on and at different speeds? Have you looked at the resistor block or volt dropped it?
The bearings are stiff and the brushes are new. It is probably ok. The bearings get looser with wear and age. As new square brushes wear to a curved shape that fits around the armature, the motor's timing advances a bit and it goes faster....
The bearings are stiff and the brushes are new. It is probably ok. The bearings get looser with wear and age. As new square brushes wear to a curved shape that fits around the armature, the motor's timing advances a bit and it goes faster....
SOOO just what monitors or controls timing in an eletric DC motor?
The placement of the brushes in relation to the magnets. You may have noticed on most motors the brush mounts are in a fixed position. I've seen on older motors a provision for adjustment, but then there were not as many segments on the commutator...
In this case, if the brushes are new and square, they are not making much surface contact with the commutator. The point of initial contact is moved back from where it is when the brushes are worn round the communator and making more surface contact.
The placement of the brushes in relation to the magnets. You may have noticed on most motors the brush mounts are in a fixed position. I've seen on older motors a provision for adjustment, but then there were not as many segments on the commutator...
In this case, if the brushes are new and square, they are not making much surface contact with the commutator. The point of initial contact is moved back from where it is when the brushes are worn round the communator and making more surface contact.
...which means less resistance and more current flow through more contact surface area... . In some cases, a fan that has to be slapped to get going again is usually a broken wire in the windings(intermittent open). A continunity/OHMS check may or may not reveal this. A faulty resistor on the resistor block may give a similar symptom( too much resistance=slower fan speed).
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94 Tercel Blower Motor Trouble
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