Commercial Generator Maintenance CT
Generator Maintenance CT
Commercial Generator Maintenance in Connecticut
A commercial generator is one of the most critical assets for your business. It keeps your operations running smoothly during unexpected power outages, preventing loss of revenue, damaged equipment, and customer dissatisfaction. But like any complex machine, commercial generators can face issues—such as battery failure, fuel contamination, coolant leaks, clogged filters, or worn-out components.
When your generator develops these problems, immediate attention is essential to avoid costly downtime. That’s why it’s important to have a reliable commercial generator maintenance service you can trust. Regular maintenance not only helps identify and fix small issues before they become big ones, but also ensures your generator is ready to perform when your business needs it most.
Whether you operate a hospital, restaurant, office, or industrial facility, having a routine maintenance contract in place is the smart way to protect your investment and keep your power supply uninterrupted.






Our Commercial Generator Maintenance Process
At A&J Generator & Equipment, we follow a thorough and proven maintenance process designed to keep your commercial generator operating at peak performance. Whether it’s a Blue Star, KOHLER, or Taylor Power Systems generator, our certified technicians use a systematic approach tailored to each unit’s specifications and your business needs.
Initial System Inspection
Every maintenance visit starts with a comprehensive visual and operational inspection. We assess all major components—including engine, alternator, cooling system, and enclosure—for wear, damage, or visible issues.
Fluid Level Check & Replacement
Our team checks and tops off all essential fluids: Engine oil, Coolant, Fuel. We also inspect fluid quality to detect signs of contamination or degradation. If necessary, we perform full replacements to maintain manufacturer-recommended performance levels.
Battery Testing & Charging System Check
A dead or weak battery is one of the most common causes of generator failure. We test battery voltage, inspect terminals for corrosion, and evaluate the charging system to ensure your generator starts instantly when needed.
Filter Inspection and Replacement
Air, fuel, and oil filters are essential to your generator’s reliability. Dirty or clogged filters restrict performance and increase wear. Our technicians clean or replace filters based on usage hours, environment, and brand-specific guidelines.
Load Bank Testing (Optional)
For clients who want to ensure full performance, we offer load bank testing to simulate real-world conditions. This process ensures your generator can handle the required electrical load and helps identify hidden issues before they cause a failure during an actual outage.
Control Panel & Alarm System Review
We test all monitoring systems, alarms, and control panel settings to ensure your generator alerts you properly in case of faults. This step is crucial for environments like hospitals or data centers where immediate notification is vital.
Detailed Maintenance Report
After every maintenance session, we provide a full-service report outlining: Services performed , Any issues found , Recommendations for future care or repair. This transparency keeps you informed and confident in your system’s reliability.
Maintenance for KOHLER Generators
KOHLER generators are trusted in hospitals, commercial buildings, and mission-critical facilities due to their efficiency and long-term reliability. Our KOHLER maintenance service includes:
- Diagnostic testing using KOHLER-approved tools
- Firmware and control panel updates
- Inspection of automatic transfer switches (ATS)
- Battery maintenance and charging system testing
- Replacement of worn belts, hoses, or sensors
- Emergency response service available 24/7
As licensed KOHLER dealers, we ensure every component is serviced to KOHLER’s strict standards, keeping your equipment running at peak performance.
Maintenance for Blue Star Power Systems
Blue Star Power Systems manufactures American-built commercial generators, widely used across office buildings, restaurants, and industrial facilities. Whether you’re operating a 60kW standby unit or a 2mW industrial diesel system, we offer:
- Custom maintenance schedules based on runtime and fuel type
- Diesel fuel system inspection (including filters and injectors)
- Natural gas and propane system analysis
- Cooling system and radiator maintenance
- Exhaust and emissions inspection
- Monthly, quarterly, or semi-annual plans
We tailor every maintenance package to your generator’s usage environment—especially important for high-load, critical operations.
Maintenance for Taylor Power Systems
Taylor Power Systems are known for rugged performance and high-output power ranges (9kW to 2000kW). Built for harsh environments like oil fields, factories, and municipalities, these generators demand specialized attention.
Our services includes:
- Calibration and testing of digital control panels
- Inspection of heavy-duty industrial engine components
- Cleaning and securing skid bases with vibration isolation
- High-temperature performance testing (up to 122°F)
- Natural gas/LP conversion maintenance (if applicable)
- NFPA 110-compliant inspections
Reasons to Schedule Regular Generator Maintenance?
Keep your generator working in any emergencies
Prevent further issues with your generator
An affordable way to take care of your generator
Generator Maintenance – What to Expect

Generator Maintenance – What to Expect
In order to achieve maximum efficiency, you need to maintain and inspect your whole home generator regularly. All parts need to be checked and tested for ensuring the quality of your generator. An efficient standby generator can save your family a lot of money, especially when you have a prolonged power outage in your area.
Why Us for Commercial Generator Maintenance in CT?
At A&J Generators, we’re Connecticut’s go-to experts for reliable commercial and industrial power solutions. Whether you’re looking to purchase, install, or maintain a generator, we provide the experience and service you can count on—every step of the way.
Certified Technicians with Brand Expertise
We understand that every commercial facility has unique power needs. That’s why we offer customized maintenance plans based on your generator type, usage frequency, load requirements, and business schedule—whether you’re running a restaurant, office building, or industrial site.
Tailored Maintenance Plans for Your Business
Our tailored maintenance plans are created to match the specific demands of your business, taking into account factors such as the size of your generator, its usage patterns, and the critical nature of your operations. By opting for a maintenance plan, you can avoid costly repairs and extend the lifespan of your generator.
Fast Response and Minimal Downtime
Our priority is to keep your business running without interruption. With quick turnaround times and emergency scheduling, we ensure your generator is always in peak condition—reducing the risk of failure during critical moments.
Comprehensive Inspection and Preventive Care
We don’t just change the oil and walk away. Our commercial generator maintenance service includes a thorough inspection of electrical systems, filters, fluid levels, control panels, and transfer switches—along with optional load bank testing to simulate real-life power loads and identify hidden issues.
Fully Licensed, Insured & Local
A&J Generator & Equipment, LLC is fully licensed and insured, with decades of experience serving businesses across Connecticut. As a local company, we’re just a phone call away and ready to serve you with dependable, professional service.
Flexible Service Contracts
We offer flexible maintenance contracts to help you stay ahead of breakdowns without the stress of surprise costs. You’ll receive detailed service reports after every visit and clear pricing with no hidden fees—just honest, high-quality service.
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Commercial Generator Maintenance FAQ'S
We recommend servicing your commercial generator at least twice a year or after every 200–250 hours of use, depending on the manufacturer’s guidelines and your generator’s workload. More frequent maintenance may be required for high-usage or mission-critical environments.
A standard maintenance visit includes:
- Visual inspection
- Oil and coolant checks
- Battery testing
- Filter cleaning/replacement
- Fuel system inspection
- Control panel diagnostics
Optional load bank testing
Each service is tailored to your generator’s make and model—whether it’s Blue Star, KOHLER, or Taylor Power Systems.
Most maintenance visits take 1–3 hours, depending on the size of the unit and the scope of service. Load bank testing and repairs may extend the visit.
Yes, we offer flexible scheduling, including after-hours or weekend maintenance for businesses that can’t afford downtime during operating hours.
We offer both options. While one-time maintenance is available, maintenance contracts provide scheduled service, priority support, and better long-term performance at a lower cost.
OUR CUSTOMERS SAY
TESTIMONIALS
OUR CUSTOMERS SAY
John Kerchoff2024-11-19Trustindex verifies that the original source of the review is Google. Great Service and a dependable Business! james sarnelle2024-11-15Trustindex verifies that the original source of the review is Google. Best generator service. The let you know when they are coming, and they come on time. Service is very pleasant, and they know what they are doing. Have used others before but they are the best. Marisa Denaro2024-11-14Trustindex verifies that the original source of the review is Google. Excellent job done... They were very professional and my system is running fantastic!!!! elena lister2024-11-14Trustindex verifies that the original source of the review is Google. very responsive , knowledgeable and reliable - and nice too! John Rich2024-11-11Trustindex verifies that the original source of the review is Google. Company is very reliable and are extremely qualified to service our generator Regina Cahill2024-11-05Trustindex verifies that the original source of the review is Google. Totally satisfied customer Mary Sikorski2024-10-21Trustindex verifies that the original source of the review is Google. A & J Generators are the best! The generator they installed is great and their installation was exceptional. Their maintenance is also fantastic. They are knowledge, professional and friendly! Pamela Lane2024-09-26Trustindex verifies that the original source of the review is Google. Very profession and courteous. They always come on time and do a great jobVerified by TrustindexTrustindex verified badge is the Universal Symbol of Trust. Only the greatest companies can get the verified badge who has a review score above 4.5, based on customer reviews over the past 12 months. Read more
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