Furnace Blower Capacitor Symptoms

Fan motors can sometimes run even with a bad capacitor but hidden damage is still happening to the fan motor.

Furnace blower capacitor symptoms. If you hear that sound and it doesn t stop there s an electrical difficulty. If you notice an electrical burning smell when the furnace is trying to start that may be an indicator the electrical wires supplying power to the capacitor are corroded or frayed. But with a bad capacitor your blower cannot function well and may put your family s comfort at risk. The humming sounds created by the blower are indications that the capacitor has electrical problems.

If you hear a clicking sound when the capacitor kicks in that s a problem too. Open the access panel. Open the access panel to the furnace and listen for a relatively loud humming noise. The most common symptom of a bad capacitor is that the motors do not run.

Read on to know some of them. How to check a run capacitor. A bad capacitor can cause the furnace to run too hot internally and may trip a safety switch causing the furnace to shut down temporarily. Weak or bad capacitors can cause both blower motors and condenser fan motors to run slow.

Turn up the thermostat for the furnace and wait for the furnace blower to start up. Before checking the capacitor make sure. A bad or faulty capacitor can exhibit many signs and symptoms. The signs symptoms of a bad capacitor on a gas furnace blower no power.

Capacitor failure symptoms are sometime harder to identify without the right tools and expertise. This is especially true for the compressor.