Furnace Blower Motor Capacitor Symptoms

A faulty capacitor will not be able to hold the charge necessary to run the blower motor properly.

Furnace blower motor capacitor symptoms.

A bad or faulty capacitor can exhibit many signs and symptoms. Faulty capacitors lead to overheating intermittent motor operation humming noises or even outright blower motor failure. 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. Read on to know some of them.

The most common symptom of a bad capacitor is that the motors do not run. Not have a capacitor at all. To answer this question the panel door to the furnace will need to be removed. Capacitor failure symptoms are sometime harder to identify without the right tools and expertise.

Have two capacitors called a start and run capacitor. This is especially true for the compressor. The first symptoms are often intermittent failure of the compressor to start. Have only a single capacitor.

The humming sounds created by the blower are indications that the capacitor has electrical problems. Frequently each failure will be immediately followed by a trouble free actuation giving the appearance that the. Weak or bad capacitors can also cause blower motors to not run or to run slow. Excessive heat in the motor can cause the motor to malfunction.

We sell over 80 different capacitors on the following page. If you hear that sound and it doesn t stop there s an electrical difficulty. This is the most common design type. Open the access panel to the furnace and listen for a relatively loud humming noise.

This will cause the motor to run slowly causing excess heat. How to check a run capacitor. Fan motors can sometimes run even with a bad capacitor but hidden damage is still happening to the fan motor. But with a bad capacitor your blower cannot function well and may put your family s comfort at risk.

Where is a furnace capacitor located. If you notice your furnace s motor cycling frequently you should test the capacitor. 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.