A generator that doesn’t work when the power goes out is no generator at all. Whether your unit is throwing an error code, failing its test cycle, or won’t start when you need it, Hunter Service Group provides fast, reliable generator repair for San Antonio homeowners who can’t afford to be caught without backup power.
We’re a family-owned and operated company serving this community since 2015, and as a highest-rated Generac dealer, we have the certified expertise to diagnose and fix generator problems correctly the first time.
Our Services
Contact Us
Signs Your Generator Needs Professional Repair
Standby generators are built to be low-maintenance, but they’re not trouble-free. San Antonio’s heat and humidity create conditions that can accelerate wear on components, and a generator that runs its weekly test cycle without issue can still have underlying problems that only show up under real load. Watch for these signs that your unit needs professional attention:
- Your generator fails to start during its automatic test cycle or when manually tested.
- The control panel is displaying a warning light or error code.
- The unit starts but runs rough, surges, or shuts down before completing its cycle.
- You notice oil or fuel leaks around the unit or on the surrounding pad.
- The generator ran during a recent outage and hasn’t performed correctly since.
- There’s visible corrosion on electrical connections or battery terminals.
- The transfer switch isn’t activating correctly when power is interrupted.
Common Generator Problems We Diagnose and Fix
Many generator issues have specific causes that an experienced technician can identify quickly. In San Antonio, humidity-related corrosion and battery failures are among the most frequent problems we see on service calls, alongside issues that come up after generators have run hard during extended outages. Common problems we diagnose and repair include:
- Dead or weak batteries prevent the generator from starting.
- Corroded electrical connections and terminals from humidity exposure.
- Fuel system issues, including clogged filters, stale fuel, and carburetor problems.
- Faulty transfer switches that fail to switch the home over to generator power.
- Oil and coolant leaks from worn seals, gaskets, or damaged components.
- Control board failures that cause error codes or prevent normal operation.
- Alternator and voltage regulator problems resulting in inconsistent power output.
Our Generator Repair Services
Hunter Service Group handles generator repairs on all major residential standby systems, with specialized expertise in Generac equipment. Every repair call starts with a thorough diagnostic so we understand exactly what’s wrong before recommending any work. We’ll explain what we find in plain language and provide upfront, flat-rate pricing before anything gets started.
Our generator repair services cover:
- Full diagnostic and error code interpretation for Generac and other standby systems.
- Battery replacement and charging system repair.
- Transfer switch testing, repair, and replacement.
- Fuel system cleaning, filter replacement, and carburetor service.
- Electrical connection cleaning and repair for corrosion-related issues.
- Control board diagnosis and replacement.
- Engine repairs, including oil leaks, cooling system service, and worn component replacement.
- Post-repair load testing to confirm the system is performing correctly before we leave.
Why Choose Hunter Service Group for Generator Repair
When your generator needs repair, you want a team that actually knows the equipment and will give you honest answers about what it needs. Hunter Service Group is San Antonio’s highest-rated Generac dealer, and our technicians are certified and trained specifically on the systems most San Antonio homeowners rely on. We’ve been repairing generators for local homeowners since 2015, and we understand how this climate affects these systems over time.
We come to every repair call prepared to diagnose the problem thoroughly and resolve it in a single visit whenever possible. We charge flat-rate, upfront prices so there are no surprises, and we won’t recommend parts or repairs you don’t actually need. As a family-owned business, we care about getting it right, not just getting it done. Because we also handle generator installation and maintenance alongside our HVAC, plumbing, and electrical services, Hunter Service Group is the one team San Antonio homeowners trust with their whole home.
Frequently Asked Questions
Why won't my generator start during its test cycle?
The most common causes are a weak or dead battery, a fuel system issue, or a fault in the control board. A certified technician can run a full diagnostic to identify the specific cause and get the unit running reliably again.
Can a generator be repaired after running through an extended outage?
Yes. Generators that run for many hours or days during a major outage often need service afterward, including an oil change and a full system inspection. If yours has been running rough or showing error codes since a recent outage, it’s worth having it evaluated.
Does San Antonio's humidity really affect standby generators?
It does. Humidity accelerates corrosion on battery terminals, electrical connections, and metal components throughout the unit. Generators that aren’t regularly serviced in humid climates like San Antonio’s are more prone to connection failures and battery issues than those in drier regions.
How long does a generator repair take?
Most repairs are completed in a single visit. The time varies depending on what the problem is and whether any parts need to be sourced. If a return visit is needed, we’ll be upfront about that before we leave.
Do you repair generator brands other than Generac?
Our primary certification and expertise is with Generac, which is the brand we install and service most frequently. Reach out and let us know what equipment you have, and we’ll let you know how we can help.