What would cause a blower motor to draw high amps?
Blower motor breakdown can be the result of anything from old age to failed bearings, high amp draw, electrical failure in the windings, dirt accumulation, and more. Otherwise, normal old-age issues, such as bearing failure, cause seizing, which leads to massive electrical failure.
What are the symptoms of a bad blower motor resistor?
If the airflow from the vents is weak… If you try to increase the air pressure and you feel no difference in the pressure blowing, then your blower motor resistor may be failing. A damaged blower motor resistor will work on one fan speed which may not be enough to keep the inside of your car cool or warm enough.
Will a bad capacitor cause a blower motor to run slow?
The capacitor needs to be in good condition for the blower motor to function properly. If the capacitor is bad, the blower motor may run slowly or inconsistently, or overheat easily. If you notice that your blower motor works strangely or short cycles, make sure to contact professionals to inspect your capacitor.
Can a bad blower motor blower resistor?
A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed.
How do you test a blower motor amp?
HOW TO MEASURE BLOWER MOTOR AMP DRAW
- Test Instruments.
- First, Safety.
- The Test Procedure.
- Open up the blower compartment of the furnace or air handler.
- Check the rotation of the fan.
- Locate the power wire leading to the blower motor.
- Connect the amp clamp from your electrical meter around the power wire.
What happens if capacitor fails in motor?
A run capacitor is an energy-saving device that is in the motor circuit at all times. If a run capacitor fails, the motor can display a variety of problems including not starting, overheating, and vibrating. A bad run capacitor deprives the motor of the full voltage it needs to operate correctly.
What are the signs of a bad capacitor?
Here are some common symptoms of a bad AC capacitor.
- AC Not Blowing Cold Air. An air conditioner that doesn’t blow cold air is one of the first signs of a problem many homeowners notice.
- High and Rising Energy Bills.
- Humming Noise.
- Old HVAC System.
- AC Turns Off On Its Own.
- AC Doesn’t Turn On Immediately.
- AC Won’t Turn On.
Why is my blower motor only working at high speed?
The first thing that needs to be determined is the type of noise that is present and the possible sources. Rattling or knocking noises while… The blower motor only working on high speed is a common symptom of a failing blower motor resistor; but the fact the radio stopped working at the same time is unusual.
What are the symptoms of a bad blower motor relay?
3. Melted relay. Another more serious symptom of a problem with the blower motor relay is a burned or melted relay. Relays are exposed to high current loads and can sometimes get hot when they develop problems.
What causes a leaf blower to overheat and seize?
If you do not mix enough oil with your gasoline, the leaf blower’s engine can overheat and seize because of excessive internal friction. Most leaf blowers bear labels specifying the correct fuel/oil mixture. Newer models require less oil than older models.
Why is the resistor not working on my blower?
Hi There, The resistor is what controls the speed of the blower motor, not the relay. The blower motor relay supplies power to this motor when you turn the switch to “on” that can sometimes fail. When this happens, you may notice that you will not feel anything blowing out of the vents at all.