Generac Generator Service & Repair

Professional Generator Diagnostics, Repair & Maintenance

Maryland, Washington DC & Northern Virginia

When a standby generator fails during an outage, the problem is rarely simple. Modern generators contain electronic control systems, fuel regulation components, and load transfer equipment that require trained technicians to diagnose correctly.

TriStar Electric Inc. provides expert generator repair and service for residential and commercial standby generators. With over 30 years of experience, our company focuses on accurate diagnosis, efficient repair, and long term reliability, not guesswork.

Experienced Generator Technicians, Not Apprentices

Generator troubleshooting requires specialized knowledge. Many service calls fail because companies send general electricians or inexperienced technicians who replace parts until something works.

At TriStar Electric:

• All technicians are factory trained and certified
• Technicians receive annual manufacturer training
• We do not send apprentices to perform generator service
• Every technician meets our internal service standards

Our goal is to diagnose the actual problem the first time, preventing repeated visits, unnecessary parts replacement, and customer frustration.

Common Generator Problems We Repair

We service most residential and commercial standby generator issues, including:

Starting & Running Issues

• Generator won’t start
• Error codes and alarms
• Low fuel pressure faults
• Battery failures
• Starter or ignition problems
• Overcrank
• Overspeed
• Auxiliary shutdown
• Stopped alarm
• Low oil pressure

Electrical Output Problems

• Low voltage / high voltage errors
• Frequency or RPM faults
• Transfer switch failures
• Breaker tripping during outages
• Generator wont transfer
• Generator running when the power is not out

Control & Communication Errors

• Controller fault codes
• Exercise cycle failures
• Mobile link monitoring issues
• Sensors faults

Fuel & Mechanical Issues

• Natural gas pressure problems
• Propane regulator issues
• Oil leaks
• Overheating shutdowns

If your Generac standby generator is not working, a proper diagnostic process is critical to avoid recurring failures.

Why Correct Diagnosis Matters

Many generator service companies operate by trial-and-error, replacing batteries, regulators, or control boards until the system runs again. While it may temporarily work, the underlying issue often remains.

Incorrect diagnosis can lead to:

• Multiple service visits
• Unnecessary parts costs
• Continued failure during outages
• Loss of confidence in the system

TriStar Electric technicians identify the root cause, so the repair only needs to be performed once.

Residential Generator Service

Home standby generators must operate automatically during storms and outages. We repair systems powering:

• Entire homes
• Essential circuits
• Sump pumps
• HVAC systems
• Cooking appliances
• Car chargers
• Internet and phones
• Lighting and outlets
• Medical equipment

Our residential service focuses on restoring reliability so homeowners can trust their backup power again.

Commercial Generator Service

Business standby generators protect operations, safety systems, and revenue. We service generators installed at:

• Daycares
• Manufacturing facilities
• Distribution facilities
• Food processing facilities
• Ambulance dispatch center
• Pharmacies
• Shipping and packaging centers
• Office buildings
• Warehouses
• Churches and Non-Profit Centers
• Government buildings and Embassy’s
• Senior living facilities
• Animal rescues and Veterinary hospitals
• Medical facilities
• Retail stores
• Restaurants

Commercial downtime can be costly, rapid and accurate repair is critical.

Preventative Generator Maintenance

Many failures occur due to lack of maintenance rather than component failure. Regular service helps prevent unexpected outages.

Routine maintenance includes:

• Oil and oil filter service
• Spark plugs and air filters
• Battery testing and replacement
• Fuel system inspection
• Transfer switch operation testing
• Fault history review

A maintained generator is far less likely to fail during severe weather.

Emergency Generator Service

We offer after hours emergency generator service.

When calling after hours:

1. Contact our after hours team
2. Tell them it is an EMERGENCY
3. Your information is immediately texted to a generator service technician
4. You can expect a callback within approximately 1 hour (depending on call volume)

If the call is not marked emergency, it will be reviewed the next business day.

Maintenance agreement customers receive priority response.

Why Choose TriStar Electric for Generator Repair

35+ years serving the region

Factory trained Generac generator technicians

No apprentice service technicians

Accurate diagnosis first visit

Residential & Commercial expertise

Long term support throughout the life of the system and more!

We maintain high service standards so customers receive dependable repairs and professional communication from start to finish.