Your generator worked during last year’s major power outage. However, you just tried powering it up, whether because you needed it or were performing a test run, and it’s not producing any power. A few different issues could be to blame.

Tripped or Blown Circuit Breaker

Most generators have a built-in circuit breaker that protects the unit and connected devices from short circuits and overloads. This circuit breaker will trip, and the generator won’t put out any power. If your unit has one, you could have overloaded it or had a short circuit. Repairing the problem is as easy as resetting the breaker. To reset it, press the button or flip the switch on the control panel.

Defective Transfer Switch

Standby generators have transfer switches for safety purposes. They ensure power exits the generator to your home’s circuits. The switch serves the purpose of preventing electricity from being sent back to utility lines. If the switch is faulty, the generator might not produce power due to an internal contact that’s stuck open and causing an incomplete connection.

The transfer switch could also have a faulty sensor. When the sensor functions normally, it detects utility voltage and determines when to turn the generator on. When this part isn’t working, the unit won’t engage.

Because of the high voltage and complex wiring, replacing the switch isn’t a DIY job for the average person. As a warning, if you were to replace it yourself, you could void your warranty or insurance coverage.

Failed Voltage Regulator

The voltage regulator prevents damage to devices plugged into it and ensures they receive consistent power. Naturally, a generator’s voltage fluctuates when its engine speed or load changes. The voltage regulator adjusts the output so it remains in a safe range at all times.

Whenever this part of the unit fails, it may not send the proper signals to the generator’s excitation system. The generator then won’t be able to produce power. A loose, damaged, or corroded wire coming from the regulator could be the problem, which requires replacing or tightening.

If the problem is the voltage regulator, a professional will need to replace it so your generator produces power again. Like with the transfer switch, this job should be done by a professional electrician for safety purposes and to prevent voiding your insurance or warranty.

You don’t want to be left in the dark with no way to charge your phone and other devices. So if your generator isn’t producing power, try resetting the breaker. If that doesn’t work, you should contact a professional to find out the cause.

Expert Electricians Can Help

Contact Hawaii Electrical Source, serving Honolulu, HI, and the surrounding areas, to schedule a generator service call.