Generator Service
Generator maintenance & Generac service on the North Shore
When the power goes out, your standby generator has to start the first time, every time. Greco Electrical Contractors has kept North Shore homes powered since 1990 — with annual maintenance, expert repairs, and professional installation for Generac and all major brands.
Complete generator care
Annual maintenance
Scheduled tune-ups that keep your standby generator ready to run when the power goes out — oil, filters, battery, and a full operational test.
Generac service & repair
Diagnostics and repairs for Generac and other major brands, from error codes and failed transfers to worn components and weak batteries.
Installation & sizing
Whole-home and partial-load standby generators properly sized, permitted, and installed to code for true peace of mind.
Transfer switch checks
We verify your automatic transfer switch reliably hands off to backup power the moment utility power drops.
What an annual maintenance visit includes
A thorough, manufacturer-aligned inspection that protects your warranty and keeps your generator ready year-round.
- Oil and filter change
- Air and fuel filter inspection
- Battery test and replacement
- Spark plug inspection
- Coolant and fluid levels
- Automatic transfer switch test
- Full load test under power
- Error code diagnostics
FAQ
Generator maintenance questions
How often should a home standby generator be serviced?
We recommend a professional maintenance visit at least once a year, plus a service after every 100–200 hours of run time. Annual maintenance keeps the warranty valid and ensures the unit starts when you need it.
Do you service Generac generators near me?
Yes. We service Generac and all major standby generator brands throughout Highland Park and the North Shore, including Glencoe, Winnetka, Deerfield, Lake Forest, and surrounding communities.
What does a generator maintenance visit include?
A full inspection: oil and filter change, battery and spark plug check, fluid levels, transfer switch test, and a load test to confirm the generator runs correctly under real conditions.
My generator won't start — can you help?
Absolutely. We diagnose and repair generators that fail to start, won't transfer to backup power, or throw error codes. Call 847-432-2070 to schedule a visit.
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- Family Owned Since 1990
- Licensed & Insured
- Free Estimates
- 24/7 Emergency Service
2687 Waukegan Ave, Highland Park, IL 60035