Furnace Blower Capacitor Symptoms

If your condenser fan motor is running slow it could be a weak capacitor or a condenser fan motor where the bearings are dragging and the motor is on its way out.

Furnace blower capacitor symptoms.

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. Read on to know some of them. 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.

The signs symptoms of a bad capacitor on a gas furnace blower no power. Before checking the capacitor make sure. Turn up the thermostat for the furnace and wait for the furnace blower to start up. Fan motors can sometimes run even with a bad capacitor but hidden damage is still happening to the fan motor.

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

If you hear a clicking sound when the capacitor kicks in that s a problem too. Weak or bad capacitors can cause both blower motors and condenser fan motors to run slow. How to check a run capacitor. A faulty capacitor may prevent the blower from functioning at all.

The most common symptom of a bad capacitor is that the motors do not run. A bad or faulty capacitor can exhibit many signs and symptoms.