Furnace Blower Capacitor Symptoms

The humming sounds created by the blower are indications that the capacitor has electrical problems.

Furnace blower capacitor symptoms.

Turn up the thermostat for the furnace and wait for the furnace blower to start up. Weak or bad capacitors can cause both blower motors and condenser fan motors to run slow. Read on to know some of them. How to check a run capacitor.

A faulty capacitor may prevent the blower from functioning at all. 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. 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.

Call your hvac heating ventilation and air conditioning professional. 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. 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.

Fan motors can sometimes run even with a bad capacitor but hidden damage is still happening to the fan motor. Before checking the capacitor make sure. 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. If you hear that sound and it doesn t stop there s an electrical difficulty.

This is especially true for the compressor. A bad or faulty capacitor can exhibit many signs and symptoms.