The wind picks up over Mount Burdell, PG&E sends the shutoff alert, and the lights go out across the street. You wait for the familiar hum from the side yard. Nothing happens.

That silence is the moment most homeowners first search for generator repair in Novato. A standby generator is supposed to take over in seconds. When it doesn’t, the fridge, well pump, medical equipment, and home office all go down.

The good news is that most failures come down to a short list of causes. Three of them account for most of the repair calls our electricians in Novato see. They are the starting battery, the transfer switch, and the fuel supply. This guide walks you through each one, what you can safely check yourself, and how to get repair done fast.

If you’ve already read our guide to standby generator maintenance in Novato, think of this post as its partner. Maintenance keeps problems from starting, and this post covers generator repair when a problem already exists.

Why Generators in Novato Fail When You Need Them Most

Novato is the northernmost city in Marin County, and it sits closer to the wind corridors that trigger Public Safety Power Shutoffs. Many homeowners installed standby generators during the shutoff waves of 2019 and 2020. Those systems are now reaching the age when batteries, relays, and seals start to wear out. For many homeowners in Novato, generator repair is now a bigger need than a new install.

Novato’s mix of terrain adds its own stress. Homes near Bel Marin Keys and the Novato Creek marshlands deal with steady moisture that corrodes terminals and connectors. Properties that back up to open space near Mount Burdell, Indian Valley, and Pacheco Valley see heavy rodent activity, and a quiet generator enclosure makes an attractive nest.

The biggest factor, though, is time. A unit can sit idle for months between outages. Small problems build quietly until the day the grid goes down, and that is exactly when you find out about them. We see the same pattern in homes across Marin County.

Generator Won’t Start? The Most Common Causes in Novato

When a generator won’t start, homeowners often assume the engine has failed. In reality, the engine is rarely the problem. Most no-start calls trace back to one of the parts below, and several of them are quick fixes for a trained electrician. If your generator won’t start, begin here.

Dead or Weak Starting Battery

Most no-start calls trace back to one small part: the starting battery. It powers the controller and cranks the engine, and most last about three to five years. Heat in inland neighborhoods like San Marin and Ignacio shortens that life, and moisture near the bay corrodes the terminals.

A weak battery can still pass a quick weekly exercise and then fail under a real start. Signs include slow cranking, a clicking sound, or a control panel that flickers or goes blank. Battery replacement is one of the fastest generator repairs we handle in Novato, often finished in a single visit. It’s also the first thing we test when a generator won’t start.

Transfer Switch Failure

The automatic transfer switch is the brain between your generator and your home. It senses the outage, signals the generator to start, and then moves your home’s circuits from the utility to generator power. If the switch fails, the generator may never get the signal to start.

Transfer switch problems often show up as a generator that starts on its weekly test but stays silent in a real outage. Worn contacts, a failed relay, or a loose control wire can all cause it. It’s also one of the most common reasons a unit won’t start in a real outage. Transfer switch work is a common part of generator repair in Novato. It’s licensed electrical service, not a DIY fix, because the switch connects directly to your main panel and the utility line.

Fuel Supply Problems

Your generator can’t run without steady fuel. Most homes use natural gas, while rural properties off Atherton Avenue, Olompali, and the Indian Valley hills often run on propane. Each fuel type has its own failure points.

With natural gas, a closed shutoff valve, an undersized gas line, or low pressure from the meter can starve the engine. With propane, the tank may be low, or the regulator may freeze up or fail. A generator that starts and then sputters out within a minute is a classic fuel supply symptom. It’s one of the most common propane issues we see on rural lots.

Control Board Faults and Error Codes

Modern generators run on a controller that monitors everything from oil pressure to engine speed. When it detects a problem, it shuts the unit down and posts an error code. Sometimes the generator is simply sitting in “Off” or “Manual” mode after a previous service visit or a power surge.

Error codes are useful clues. If your generator won’t start and the screen shows a code, take a photo before you clear it. That photo helps our electricians arrive with the right parts and finish your repair sooner.

Rodent and Moisture Damage

This is the most specific cause on the list, and a growing reason for generator repairs in Novato. Rats and mice from nearby open space chew through wiring harnesses, sensor leads, and fuel lines. Nesting material can also block airflow and trap moisture against electrical connections.

Rodent damage often looks random. One week the generator passes its test, and the next it throws a fault or won’t start at all.

When the Generator Runs but Your Home Stays Dark

Sometimes the generator starts right up, but your lights never come back on. This is almost always a problem between the generator and your home’s electrical system, not the engine itself.

The transfer switch is the first suspect. If it fails to move your circuits over, the generator runs without powering anything. A tripped breaker on the generator itself is the second most common cause. It often trips when a large load, like a well pump or HVAC system, kicks on.

Load management modules can also play a role. These modules shed big appliances, like an EV charger or central air, to keep the generator from overloading. If one is set up incorrectly, it can drop circuits you expect to stay powered. Homes that have added an EV charger since the generator went in should have their load settings reviewed. This type of repair often comes down to a switch repair or a settings adjustment.

What You Can Safely Check Before You Call

If your generator won’t start, a few simple checks can save time. Sometimes they solve the problem outright, and many calls for generator repair in Novato begin with these same steps. Stick to the steps below and leave anything inside the enclosure or the transfer switch to a licensed electrician.

• Look at the control panel — Note whether it shows “Auto,” “Off,” or “Manual,” and take a photo of any error code
• Check the fuel source — Confirm the gas shutoff valve is open, or that your propane tank gauge reads above 20 percent
• Check the generator’s breaker — Many units have a main breaker on the generator itself that may have tripped
• Let it cool down — If the unit shut off mid-outage, give it at least 30 minutes before trying again
• Never backfeed your home — Do not plug a generator into an outlet or bypass the transfer switch. Backfeeding can injure utility line workers and damage your panel

The U.S. Consumer Product Safety Commission also shares generator and carbon monoxide safety tips worth reviewing before the next storm. If your generator won’t start after these checks, it’s time to call a professional.

How to Get Generator Repair in Novato Done Fast

Speed matters most when an outage is already underway or a shutoff is in the forecast. These steps apply anywhere in Marin County, but they matter most in Novato, where shutoff notices often arrive early. A few details help our team diagnose the problem before we arrive.

Information That Speeds Up Your Repair

Have the generator’s brand, model, and approximate install year on hand. Share a photo of the control panel and any error code. Let us know when the unit last ran its weekly self-test and whether it has ever been serviced. With that information, our professionals can often bring the right battery, relay, or part on the first visit. Clear details are the fastest path to solving the problem.

Rocky Hill Electric is Generac certified and also services Kohler, Champion, Cummins, and Honeywell systems. We repair generators installed by other companies anywhere in Marin County, too. You can find model-specific owner resources through Generac Owner Support.

Repair or Replace?

For most homeowners, generator repair costs far less than a new unit. Most generators are worth repairing, especially when the problem is a battery, transfer switch relay, or fuel component. Replacement makes more sense when a unit is over 15 years old, needs a major engine repair, or no longer matches your home’s power needs.

Many Marin County homes have added an EV charger, a heat pump, or other big loads since the generator went in. If yours has, your system may be undersized. A repair visit is a good time to talk through a new standby generator installation or an electrical panel upgrade. Older panels can limit how much backup power your home can safely use.

Why Novato Homeowners Call Rocky Hill Electric for Generator Repair

Generator repair in Novato is about more than getting the engine to turn over, and Marin County homeowners know it. It’s about knowing your backup power will work the next time PG&E issues a Public Safety Power Shutoff. Our electricians diagnose the root cause, explain what they found in plain language, and fix it right the first time.

We stand behind every generator repair with upfront pricing, no hidden costs or surprise upcharges. Our guarantee is simple: reliable, high-quality electrical services, or you don’t pay a dime. Every booked service also includes a free home electrical safety check.

Homeowners across Marin County trust our team for generator installation, maintenance, and repair. We’re SPAN certified and Tesla Energy certified, so we can also help you plan a backup power system built around solar and battery storage.

Areas We Serve Across Novato and Marin County

Our team provides generator repair in Novato, CA, and throughout Marin County. We also serve nearby communities in southern Sonoma County.

• Hamilton
• Ignacio
• San Marin
• Bel Marin Keys
• Pacheco Valle
• Black Point
• Indian Valley
• Marinwood
• Lucas Valley
• San Rafael
• Nicasio
• Petaluma

Get Your Backup Power Working Again

Don’t wait for the next shutoff to find out your generator won’t start. A dead battery, a stuck transfer switch, or a fuel supply issue can all be fixed fast. Our electricians will find the cause and fix it right the first time. Call our Marin County team before the next storm. We are ready to help with generator repair in Novato and across Marin County.

Call Now For a Free Estimate: 415-523-5201