Generator Repair & Service
Complete generator repair, rebuilding, maintenance, and rewinding services for commercial and industrial backup power systems. AANCO Electric keeps NYC's critical power infrastructure running with expert service and fast turnaround.
Generators We Service & Repair
From small portable units to large industrial standby systems, we repair, rebuild, and maintain all types of generators to keep your backup power ready when you need it most.
Diesel Generators
Complete service for commercial and industrial diesel generators from all major manufacturers.
- Standby & prime power units
- Alternator rewinding & repair
- Voltage regulator service
- Control panel troubleshooting
Natural Gas Generators
Expert service for natural gas and propane-powered generators for residential and commercial use.
- Home standby systems
- Commercial backup power
- Transfer switch service
- Ignition system repair
Industrial Generators
Heavy-duty service for large industrial generators powering critical infrastructure and manufacturing.
- Up to 2 megawatt capacity
- Medium voltage service
- Paralleling system repair
- Load bank testing
Portable Generators
Repair and maintenance for portable and towable generators used on job sites and events.
- Construction site units
- Event power systems
- Inverter generators
- Rental fleet maintenance
Marine Generators
Specialized service for marine generators and shipboard power systems in harsh environments.
- Vessel power systems
- Corrosion damage repair
- Waterproof insulation
- Shore power connections
Synchronous Generators
Expert repair for synchronous alternators and brushless generators requiring precise electrical work.
- Stator rewinding
- Rotor/field rewinding
- Exciter repair
- AVR troubleshooting
Comprehensive Generator Repair
From emergency repairs to complete overhauls, our certified technicians deliver quality workmanship backed by decades of hands-on experience with all generator types and brands.
Generator Rewinding
Expert electrical end rewinding services for generators up to 2 megawatts. We restore stators, rotors, and exciters to like-new condition using premium materials and proven techniques.
- Stator rewinding
- Rotor/field rewinding
- Armature rewinding
- DC/AC exciter rewinding
- Class H insulation
Electrical System Repair
Complete electrical system diagnostics and repair including voltage regulators, control panels, transfer switches, and all associated wiring and connections.
- AVR troubleshooting
- Control panel repair
- Transfer switch service
- Wiring & connections
- Load testing
Mechanical Component Repair
Expert repair of all mechanical generator components including bearings, couplings, cooling systems, and housing. Our machine shop handles precision repairs in-house.
- Bearing replacement
- Shaft repair & machining
- Coupling service
- Cooling system repair
- Housing & end bell repair
Dipping & Baking Services
Professional varnish dipping and controlled baking process to protect windings from moisture, contamination, and mechanical stress for extended insulation life.
- VPI (Vacuum Pressure Impregnation)
- Dip and bake process
- Moisture protection
- Enhanced insulation life
- Thermal class upgrades
Testing & Diagnostics
Comprehensive testing and diagnostic services to identify issues, verify repairs, and ensure your generator meets performance specifications before returning to service.
- Insulation resistance testing
- Surge comparison testing
- Hipot testing
- Load bank testing
- Vibration analysis
Dynamic Balancing
Precision dynamic balancing for generator rotors and rotating assemblies up to 2 tons. Reduce vibration, extend bearing life, and ensure smooth, quiet operation.
- Up to 2-ton capacity
- ISO G2.5 or better tolerance
- Single & two-plane balancing
- Detailed balance reports
- Field balancing support
Generator Maintenance Programs
Keep your backup power ready with scheduled maintenance programs designed to prevent unexpected failures and ensure your generator starts when you need it most. Regular maintenance extends equipment life and reduces costly emergency repairs.
Load Bank Testing
Full load testing verifies your generator can handle its rated capacity when needed during an outage.
Fluid Services
Oil changes, coolant service, and fuel system maintenance to keep your engine running reliably.
Battery Testing
Starting battery testing, charging system inspection, and replacement to ensure reliable starts.
Cooling System
Radiator inspection, hose replacement, thermostat testing, and coolant analysis services.
Transfer Switch
Automatic transfer switch testing, contact inspection, and timing verification for seamless switchover.
Electrical Testing
Insulation resistance, voltage output, and frequency verification to ensure electrical integrity.
Safety Systems
Safety shutdown systems, alarms, and monitoring equipment testing and calibration.
Exercise Programs
Weekly/monthly exercise testing with or without load to keep components lubricated and ready.
Generator Rebuild Services
Comprehensive generator overhaul services to restore your equipment to peak performance and extend its operational lifespan for years of reliable backup power.
Complete Disassembly
Full generator disassembly with thorough inspection and documentation of all components, identifying wear and damage requiring attention.
- Systematic disassembly
- Component cataloging
- Photo documentation
Stator Rewinding
Complete stator strip and rewind using premium copper wire and Class H insulation for maximum reliability and extended life.
- Core testing & repair
- New insulation system
- VPI or dip & bake
Rotor Rebuild
Rotor inspection, rewinding if needed, and precision dynamic balancing to ensure smooth, vibration-free operation.
- Field coil rewinding
- Slip ring resurfacing
- Dynamic balancing
Mechanical Renewal
Complete mechanical component replacement including bearings, seals, and any worn or damaged structural components.
- New bearings
- Seal replacement
- Housing machining
Exciter Rebuild
Complete exciter system rebuild including rewinding, diode replacement, and voltage regulator service or replacement.
- Exciter rewinding
- Rotating rectifier
- AVR service
Final Testing
Comprehensive testing including insulation resistance, hipot, no-load run, and full documentation before return to service.
- Electrical testing
- Performance verification
- Complete documentation
Common Generator Issues
Experiencing generator problems? Our expert technicians diagnose and repair all types of generator failures quickly and efficiently to restore your backup power.
Generator Won't Start
Battery issues, starter motor failure, fuel problems, or control system faults preventing generator startup. We diagnose and fix all starting issues.
No Power Output
Generator runs but produces no voltage. Could be AVR failure, loss of residual magnetism, exciter problems, or winding failure.
Voltage Fluctuations
Unstable voltage output causing equipment problems. Often related to AVR issues, speed governor problems, or load imbalances.
Overheating
Generator running hot or shutting down on high temperature. Cooling system issues, overloading, or ventilation problems require immediate attention.
Excessive Vibration
Abnormal vibration indicating unbalanced rotating components, bearing wear, misalignment, or mechanical damage requiring repair.
Unusual Noises
Grinding, knocking, or whining sounds from the generator indicating bearing failure, loose components, or internal damage.
Transfer Switch Failure
Automatic transfer switch not engaging or transferring improperly, leaving your facility without backup power when needed.
Fuel System Problems
Fuel contamination, injector issues, or fuel pump failure causing poor performance or failure to run under load.
Battery Issues
Dead batteries, charging system failures, or weak starting preventing reliable generator operation when power fails.
Control Panel Faults
Controller malfunctions, sensor failures, or programming issues preventing proper generator operation and monitoring.
Generator Applications We Support
From critical healthcare facilities to commercial buildings, we service generators supporting diverse backup power applications throughout New York City.
Healthcare Facilities
Hospitals, clinics, and medical centers requiring uninterrupted power for life-safety systems
High-Rise Buildings
Commercial and residential towers requiring elevator, fire pump, and emergency lighting power
Data Centers
Mission-critical facilities requiring continuous power for servers and network equipment
Manufacturing
Industrial facilities requiring backup power to protect processes and prevent production losses
Commercial Buildings
Office buildings, retail spaces, and mixed-use properties with code-required backup power
Schools & Universities
Educational institutions requiring emergency power for safety and critical operations
Water & Wastewater
Pumping stations and treatment facilities requiring backup power to maintain operations
Telecommunications
Cell towers, switching centers, and network facilities requiring continuous uptime
Generator Brands We Service
Trusted Across All Industries
From property management to critical infrastructure, we serve diverse industries throughout New York City and the tri-state area.
Healthcare
Property Management
Manufacturing
Data Centers
Telecommunications
Education
Government
Utilities
How Generator Service Works
From initial contact to final delivery, we make the generator service process simple and efficient.
Contact Us
Call or request a quote online. Describe your generator problem and we'll provide guidance.
Free Evaluation
Bring your generator to our Brooklyn facility. We'll diagnose the issue and provide a detailed quote.
Expert Repair
Our certified technicians complete repairs using quality parts and proven techniques.
Testing & QC
Every generator undergoes comprehensive testing to ensure it meets performance specifications.
Ready for Pickup
Pick up your generator when ready. All repairs backed by our comprehensive 90-day warranty.
Why Choose AANCO Electric
For over two decades, we've built our reputation on quality workmanship, fast turnaround, and exceptional customer service.
2MW Rewinding Capacity
Our facility handles generator rewinding up to 2 megawatts, allowing us to service even the largest commercial and industrial units in-house.
Full-Service Facility
Our Brooklyn facility includes a complete machine shop, motor repair shop, balancing equipment, and testing capabilities to handle any generator repair.
24/7 Emergency Service
When your backup power fails, you need help fast. Our emergency service team is available around the clock to get your generator running.
90-Day Warranty
Every repair is backed by our comprehensive 90-day warranty, giving you confidence in our workmanship and peace of mind for your operations.
24/7 Emergency Generator Service
Generator down? Don't wait. Call now for emergency repair service.
Frequently Asked Questions
Common questions about our generator repair, service, and maintenance programs.
We service generators of all sizes, from small portable units to large industrial systems. Our facility can handle generator rewinding up to 2 megawatts and dynamic balancing for components up to 2 tons.
Repair time depends on the issue. Simple electrical repairs may take 2-3 days, while complete rewinding or rebuilds can take 2-4 weeks. We provide accurate timelines after diagnosis and offer expedited service for emergencies.
Yes, we offer comprehensive preventive maintenance programs customized to your generator type and usage. Regular maintenance helps prevent unexpected failures and keeps your backup power ready when needed.
We provide honest assessments based on your generator's condition, age, and repair costs. Often, rewinding or rebuilding is more cost-effective than replacement, especially for quality equipment. We'll help you make the best decision.
All generator repairs are backed by our comprehensive 90-day warranty covering parts and labor. This gives you confidence in our workmanship and ensures your generator performs reliably.
Bring your generator to our Brooklyn facility at 107 14th Street. We have loading facilities for heavy equipment. For questions about transporting large generators, give us a call and we can advise on the best approach.
Ready to Get Your Generator Fixed?
Contact us today for a free quote on your generator repair, rebuilding, or maintenance needs. Fast turnaround, competitive pricing, and quality you can trust.
Phone
(718) 499-3000Address
107 14th Street
Brooklyn, NY 11215
Hours
Mon-Fri: 8AM - 5PM
24/7 Emergency Service
90-Day Warranty on All Repairs
Every generator repair is backed by our comprehensive warranty, giving you confidence in our workmanship and peace of mind for your backup power systems.