Generator Maintenance & Standby Generator Repair in San Rafael and Marin County
Fast, Certified Generator Repair & Maintenance for Marin County Homeowners
When your standby generator fails, the timing is almost always the worst possible. A storm has knocked out power across the neighborhood, or a PG&E Public Safety Power Shutoff is in effect, and the one system you installed specifically for this moment won’t start.
Rocky Hill Electric provides expert standby generator repair in San Rafael, CA, and across all of Marin County, so that a situation like that never catches you off guard. Our licensed, Generac-certified technicians diagnose and repair all major generator brands quickly and correctly, getting your backup power system back online and keeping it ready for a power outage.
We serve homeowners and businesses from Dominican and Terra Linda in San Rafael to the ranch properties of Nicasio, the coastal communities of Stinson Beach and Bolinas, and everywhere in between. Whether you need an urgent repair or a scheduled annual maintenance visit, Rocky Hill Electric is the team to call.
Schedule Your Generator Repair in San Rafael. Call 415-523-5201
Why Your Standby Generator Needs Certified Repair
A generator is not a simple appliance. It’s a permanently installed, fuel-connected, transfer-switch-integrated backup power system that has to start automatically and perform reliably under real emergency conditions. When something goes wrong, guesswork isn’t good enough.
Marin County homeowners depend on their generators more than residents of most other California counties. PG&E PSPS events during wildfire season regularly affect communities from Novato in North Marin to Woodacre and Nicasio deep in West Marin. Coastal communities like Stinson Beach, Bolinas, and Inverness face winter storms that can cut power for days at a time. In Point Reyes Station, the rural grid and single-road access mean utility restoration can take far longer than anywhere else. For all of these communities, a generator that fails during an outage is a generator that fails when it matters most.
Certified Repair
Certified standby generator repair means your system is diagnosed by someone who knows the technology, is repaired with the right parts, and is verified under load before we leave. That’s the only kind of repair worth having.
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Common Standby Generator Problems We Repair
Our technicians diagnose and repair the full range of failure modes across all major brands. Here are the most common issues we encounter during generator repair in Marin County.
Generator won't start
This is the most frequent call we receive. Common causes include a dead or degraded battery, a clogged carburetor from stale fuel sitting unused for months, a faulty fuel solenoid, or a problem at the transfer switch. Each cause requires a different fix, and only a proper diagnosis tells you which one you’re dealing with.
Generac fault codes and error indicators
Generac units display specific fault codes when something is wrong.
- 1505 or 1515 typically indicates a fuel supply issue or an internal fault
- 1300 signals low oil pressure
- 1400 points to an overcrank condition
Our Generac repair technicians know these codes fluently and use them as a starting point for a precise diagnosis.
Battery failure
Generator batteries degrade over time and lose the ability to hold a charge. A battery that tests fine under no load can still fail to deliver the cranking current needed to start the engine under real conditions. Batteries should be tested annually and replaced every three to four years as part of a proper generator maintenance plan.
Fuel system issues
Generators that sit unused for extended periods accumulate varnish and gum deposits in the carburetor and fuel lines. This is one of the most common causes of a generator not starting up that we see during standby generator troubleshooting visits. Cleaning or replacing the carburetor, clearing fuel lines, and replacing fuel filters resolves most fuel-related issues.
Oil leaks and low oil pressure
Oil leaks from the oil pan gasket, valve cover gasket, or oil filter housing are common in older units. Running low on oil due to an undetected leak can cause serious engine damage. If your generator’s low oil pressure sensor has triggered a shutdown, don’t attempt to restart it until the cause is identified.
Coolant leaks and overheating
Liquid-cooled units develop coolant leaks over time as hoses and gaskets deteriorate from thermal cycling. Low coolant leads to overheating and, in severe cases, engine damage. During any generator repair in Marin County, we inspect the complete cooling system, including hoses, the radiator, and the water pump seals.
Transfer switch faults
The automatic transfer switch is the component that detects a power failure and switches your home from grid power to generator power. A faulty transfer switch means your generator may start but your home won’t receive the power. Transfer switch failures require a licensed electrician in San Rafael to diagnose and repair the issue safely.
Corroded connections and terminals
Battery terminals and electrical connections corrode over time, especially in the humid coastal environments of West Marin communities like Bolinas and Stinson Beach. Corrosion creates resistance that interferes with starting and normal operation. Cleaning and treating connections is a standard part of our diagnostic and maintenance visits.
Our Generator Repair & Maintenance Process
We keep the process straightforward and transparent from the first call to the final load test.
- Diagnostic call — you describe the symptoms, we advise on urgency and next steps
- On-site visit and fault diagnosis — full inspection using proper diagnostic tools
- Written repair estimate — clear, itemized, no hidden costs
- Repair execution — completed by certified technicians using quality parts
- Load test and system verification — we confirm the generator performs correctly before leaving
- Maintenance plan offer — annual service scheduling to protect your investment going forward
Standby Generator Repair Cost in San Rafael and Marin County
Transparent pricing is something we take seriously. Most standby generator repairs in San Rafael, CA fall into the range of $700 to $1,500, depending on the specific issue, the generator brand and model, the parts required, and the labor involved. Some straightforward repairs, like a battery replacement or carburetor cleaning, land toward the lower end. More complex jobs, such as a transfer switch replacement or a fuel system overhaul on an older unit, can be higher in the range.
Factors that affect the final cost include:
- Age of the unit
- Parts availability for your specific brand and model
- Electrical panel upgrades alongside the generator work
- Accessibility on installation site
We provide a written estimate before any repair work begins, so there are no surprises when the job is done.
Maintenance = savings
The most cost-effective approach, by a significant margin, is a well-maintained generator that rarely needs major repairs. Annual generator maintenance in San Rafael and Marin County typically costs far less than a reactive repair visit; it’s the single most effective way to protect both your generator and your budget.
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Generator Brands We Repair in Marin County
Our technicians are experienced with all major residential and commercial brands. We bring the same diagnostic rigor to every brand, and we use quality replacement parts that meet or exceed OEM specifications.
Generac
This is the brand we work with most extensively. Rocky Hill Electric is a certified Generac installer and repair specialist, which means our technicians have completed the manufacturer’s official training program and are authorized to service any equipment to factory standards.
Generac repair is our deepest area of expertise, from Guardian Series home standby units to larger commercial systems. If you have a Generac generator anywhere in Marin County, you should have it serviced by a certified technician.
Learn more about Generac’s standby generator systems directly from the manufacturer.
Kohler
Kohler generators are well-regarded for their durability and are common throughout San Rafael and broader Marin County. Our team has strong experience with Kohler residential standby units and handles both scheduled maintenance and repair work on these systems.
Cummins
This brand produces robust standby systems used in larger homes and light commercial applications. Our technicians are familiar with Cummins generator diagnostics and repair across the range of residential units.
Champion and Honeywell
These systems are also serviced by our team. And if your generator isn’t on this list, call us anyway. Our diagnostic process works across virtually all major brands.
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Prevention First: Annual Generator Maintenance in San Rafael
The most common reason units fail during an outage is simple: they weren’t maintained. A standby generator that runs a weekly self-test and sits idle the rest of the time is not the same as one that’s been properly maintained and serviced. Regular generator maintenance in San Rafael is the difference between a system that works when you need it and one that doesn’t.
Our annual generator maintenance visits cover every critical component of your system. We change the engine oil and oil filter, inspect and replace spark plugs as needed, test and clean the battery and terminals, check coolant levels and inspect hoses for signs of deterioration, run a full load bank test to verify the generator performs under real demand, and test the automatic transfer switch to confirm it detects an outage and switches power correctly.
Our team also inspects the fuel system for leaks, checks for error codes or fault history in the system’s control board, and cleans the exterior housing and air intake.
Prevention is the word
Prevention is the right way to think about generator maintenance in Marin County. A unit that receives proper annual service is far less likely to need an emergency repair call in the middle of a storm. It also maintains its manufacturer warranty. Most Generac warranties, for example, require documented annual service by a certified technician. Skipping maintenance doesn’t just risk a breakdown; it can also void the warranty coverage you paid for when you bought the system.
We offer annual generator maintenance plans that make scheduling easy and take the responsibility of remembering off your plate entirely. For Marin County homeowners in areas with high PSPS exposure, including Nicasio, Point Reyes Station, and Woodacre, a maintained backup power unit is genuine emergency infrastructure.
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Areas We Serve for Generator Repair in Marin County
Rocky Hill Electric provides standby generator repair in San Rafael, CA, and across the full Marin County service area, including all of the neighborhoods and surrounding communities listed below.
San Rafael
Dominican, Terra Linda, Peacock Gap, Glenwood, Loch Lomond, Gerstle Park, and all surrounding neighborhoods
Central Marin
North Marin
Southern Marin
West Marin
Sonoma County
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FAQ: Standby Generator Repair in San Rafael, CA
1. How quickly can Rocky Hill Electric respond to a generator repair call in San Rafael?
For urgent situations, we prioritize same-day or next-day service whenever possible. We serve all of San Rafael and Marin County, including West Marin communities, and our technicians are available 24/7 for genuine generator emergencies. The further a property is from San Rafael, the more we recommend calling as early in the day as possible to ensure same-day scheduling.
2. Can you repair a generator and upgrade the electrical panel in the same visit?
Yes, and we recommend it when both are needed. A generator that is pushing the limits of an older or undersized panel creates real safety risks, and addressing both in a single project is more efficient and cost-effective than scheduling two separate visits. Our team routinely handles electrical panel upgrades alongside generator repair and maintenance work. If our technician identifies a panel issue during a generator service call, we will flag it and give you a clear, no-pressure assessment of what needs to be done.
3. Are you certified to repair Generac generators?
Yes. Rocky Hill Electric is a Generac-certified installer and repair specialist. Our technicians have completed Generac’s official training program and are authorized to service equipment to factory standards. Generac repair is the core of our generator service business, though we also work on Kohler, Cummins, Champion, and Honeywell systems.
4. Do you offer annual maintenance plans in addition to repair services?
Yes. We offer annual generator maintenance in San Rafael and across Marin County, covering oil and filter changes, spark plug inspection, battery testing, coolant checks, load bank testing, transfer switch verification, and a full system inspection. Maintenance plans make scheduling automatic and are the most reliable way to keep your generator ready for the next outage.
5. What are the most common signs my standby generator needs repair?
The clearest warning signs are: the generator fails to start during a power outage, it starts but doesn’t supply power to the home, it displays a fault code or error light, it runs roughly or shuts down under load, you notice oil or coolant beneath the unit, or the battery is more than three years old and has never been tested. Any of these warrants a call for standby generator troubleshooting before the next outage arrives.
6. How much does standby generator repair typically cost in Marin County?
Most generator repairs in Marin County fall in the range of $700 to $1,500. Straightforward repairs such as a battery replacement or carburetor cleaning land toward the lower end. More complex work, including transfer switch replacement or a major fuel system overhaul, can cost on the higher end of the range. We provide a written estimate before any work begins so you know exactly what to expect.
7. My generator starts but won’t supply power to the house. What could cause that?
This is most commonly a transfer switch issue. The automatic transfer switch is the component that detects the outage and reroutes power from the generator to your home’s circuits. If it fails to engage correctly, the equipment runs but your home stays dark. Transfer switch faults require a licensed electrician to diagnose and repair safely. Call us for standby generator troubleshooting and we’ll identify the cause on-site.
8. Will skipping annual maintenance void my generator warranty?
For most major brands, yes. Generac’s warranty, for example, requires documented annual service by a certified technician. Skipping maintenance doesn’t just risk a breakdown at the worst possible moment; it can also void the warranty protection you paid for. Our annual visits for generator maintenance in Marin County are documented and meet manufacturer requirements for warranty compliance.
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Call the Generator Repair Experts in San Rafael
Whether your generator needs an emergency repair, a scheduled maintenance visit, or a full diagnostic workup, our certified technicians are ready to help. Don’t wait until the next outage to find out your generator isn’t ready. Call us today and let’s make sure it is good to go.
