Troubleshoot.
Immediate steps to isolate faults and restore your grid safely.
General Maintenance & Upgrades
The generator is running but the lights won't come on. What do I check?
This is the most common call. Work through this in order:
- Check the main circuit breaker on the generator itself. It trips silently during overloads.
- Check the transfer switch breaker (usually a separate panel). Make sure it hasn't tripped.
- Confirm the transfer switch has actually switched over to generator power. Look for an indicator light or listen for the relay click.
- Check individual breakers in your home's panel for tripped breakers.
- If none are tripped and still no power, the unit may need to be field-flashed (loss of magnetism in storage). See the field flash FAQ.
The generator ran fine last time but now produces no electricity even though the engine starts.
Generators can lose their residual magnetism after sitting unused, especially portable units. This is called loss of field magnetism. First unplug everything, then attempt to field flash the unit by briefly applying a small charge to the exciter windings. Generac's portable FAQ has a step-by-step video. If field flashing doesn't work, the brushes on a brushed alternator may need replacement. That is a dealer visit.
Does my generator need to be installed by an authorized dealer to keep the warranty?
No. Generac's limited warranty does not require an authorized dealer or a licensed electrician to install the unit. That said, a certified technician is the wiser choice. Proper installation protects your investment and keeps your standby power reliable for years, so we always recommend having it done by a qualified pro.
Why do my lights dim slightly when an appliance turns on?
A momentary dimming when a heavy motor starts (like an AC unit, vacuum, or refrigerator) is completely normal. The motor draws a sudden surge of power to start up. However, if the dimming is severe or lasts more than a second, you may have an overloaded circuit or a loose neutral wire that could use an inspection at your convenience.
What is a GFCI outlet and how often should I test it?
GFCI (Ground Fault Circuit Interrupter) outlets are designed to instantly cut power if they detect water or a ground fault, preventing shocks. You will usually find them in kitchens, bathrooms, and outdoors. You should optimally press the "Test" button on them once a month to ensure the mechanism still trips quickly and reliably.
Can I upgrade my standard outlets to USB-charging outlets?
Absolutely. Swapping out standard receptacles for ones with built-in USB-A or USB-C ports is a great way to modernize your home without cluttering it with charging blocks. Since the integrated transformers are slightly larger, the outlet box behind the wall just needs to be deep enough to accommodate them safely.
How do I know when it's time to upgrade my electrical panel?
If your home still has an antique fuse box, it is definitely time. For modern breaker panels, consider an upgrade if your panel is over 25-30 years old, if you frequently run out of breaker space, or if you're planning major additions like an EV charger or a hot tub that require dedicated reliable high-amp circuits.
What's the real difference between a power strip and a surge protector?
A standard power strip simply gives you more plug space. It offers almost zero protection against electrical spikes. A surge protector actively absorbs and dissipates excess voltage (from lightning or grid fluctuations) before it reaches your expensive electronics. It's always highly recommended to protect computers and TVs with true surge protectors.
Are LED bulbs really worth replacing all my old lights?
Yes, unequivocally. LEDs use up to 90% less energy than old incandescent bulbs and last up to 25 times longer. Not only will they noticeably reduce your monthly electric bill, but they also generate almost zero heat, reducing the strain on your air conditioning during the summer. It is one of the best ROI upgrades for your home.