What Does A Capacitor Do On A Furnace Blower Motor

- February 26, 2019

If your motor has an internal centrifugal switch then you have a start capacitor. The start capacitor is only need to start the motor running.

Blower Motor

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How To Replace A Furnace Blower Motor And Capacitor Hvac

Used in furnaces hvac systems and ac units of all varieties.

What does a capacitor do on a furnace blower motor. Capacitor operation in the blower. Troubleshooting a bad capacitor in your furnace. They are generally divided into two types both of which provide electricity to the furnace apparatus at key times.

First be sure that the capacitor is discharged before using it for safety reasons. Make sure that the microfarad reading is within 10 of the rated capacitance on the capacitor which will be a number listed either uf or mdf. Youll hear it the switch click when it makes or breaks contact as the motor speeds up or slows down.

Like a battery the capacitor stores the extra energy that is needed to jump start the furnace blower. When the control board initiates the blower the run capacitor closes the circuit to begin moving the blower fan. Burners heat air entering the furnace.

How to check a run capacitor. Gas entering your furnace is ignited by the pilot light and burners heat the air. Gas that enters the furnace is ignited by the pilot light.

The furnace blower blows hot air through the duct system of the home. Extra energy is required to power the blower so its connected to a capacitor that works like a battery. What is a capacitor.

There is also a run capacitor. The capacitor stores up to 400 volts of energy. The first kind of capacitor is a start capacitor which helps the motor start up when you first turn on your heater.

Furnace blower repair loud motor and how to test a capacitor duration. Your furnace uses a lot of energy so to supply the extra energy needed to power the blower gas furnaces have a capacitor. The blower then moves the warmed air into and through the ductwork in your house.

Capacitors are a part of the fan motor in your furnace. A control board attached to the blower determines when the blower should start. Furnace blower motors take a lot of juice to get moving since they are heavy.

To check a furnace blower motor use a capacitor tester. Start capacitors have a higher capacitance than a run capacitor. When the furnace starts up the blower begins pushing air throughout your home.

Your furnace voltage is 110 120 and thats not enough to do the job.