Weak or bad capacitors can also cause blower motors to not run or to run slow.
Furnace blower motor capacitor symptoms.
Frequently each failure will be immediately followed by a trouble free actuation giving the appearance that the.
Have only a single capacitor.
If you notice your furnace s motor cycling frequently you should test the capacitor.
Please click here to see the capacitors we sell.
Have two capacitors called a start and run capacitor.
Some units do not use a capacitors to run the blower motor.
Fan motors can sometimes run even with a bad capacitor but hidden damage is still happening to the fan motor.
Where is a furnace capacitor located.
Not have a capacitor at all.
Excessive heat in the motor can cause the motor to malfunction.
We sell over 80 different capacitors on the following page.
How to check a run capacitor.
The most common symptom of a bad capacitor is that the motors do not run.
To answer this question the panel door to the furnace will need to be removed.
This will cause the motor to run slowly causing excess heat.
The first symptoms are often intermittent failure of the compressor to start.
Capacitor failure symptoms are sometime harder to identify without the right tools and expertise.
Although only pros should test or repair capacitors you can examine your.
If it is turn up the thermostat and see if the blower motor starts within a few minutes.
If you hear a clicking sound when the capacitor kicks in that s a problem too.
This is the most common design type.
A faulty capacitor will not be able to hold the charge necessary to run the blower motor properly.
If you hear that sound and it doesn t stop there s an electrical difficulty.
This is especially true for the compressor.
We have two real good youtube videos near the bottom of this page which explains how to replace and troubleshoot an air conditioner s capacitors.
Faulty capacitors lead to overheating intermittent motor operation humming noises or even outright blower motor failure.
Open the access panel to the furnace and listen for a relatively loud humming noise.
The humming sounds created by the blower are indications that the capacitor has electrical problems.
