Generator Repair and Maintenance Services for Homes and Businesses
One team for the whole life of your backup power system: installation, routine maintenance, diagnostics, repairs, parts and round-the-clock emergency response across the Houston area.
Generator Repair and Maintenance Services Under One Roof
Most people only think about their generator twice: when it is installed and when it fails. JaWilly Services offers generator repair and maintenance services for everything in between, plus the installation at the start and the emergency call when things go wrong. We work on residential and commercial systems, standby and portable, across most major makes and models.
Below you will find a short guide to each service: what it covers, who it is for and where to learn more. Four specialties have their own detailed pages; residential installation and routine maintenance are explained in full right here.
Our Core Generator Service Specialties
Pick the card that matches your situation for a deeper look at how we handle it.
Generator Diagnostics
Pinpoint testing that finds the real cause of a no-start, a fault code or a weak output before any part is replaced.
Explore Generator Diagnostics
Emergency Generator Support
Call or text 24/7 when your backup power fails mid-outage — a technician gets your home or business running again.
Explore Emergency Generator Support
Generator Parts & Replacement
OEM-approved batteries, starters, regulators, filters and controller components, installed and tested on site.
Explore Generator Parts & Replacement
Commercial Generator Solutions
Installation, scheduled maintenance and repair programs that keep offices, shops and facilities powered.
Explore Commercial Generator SolutionsRoutine Generator Maintenance Service
A standby generator can sit idle for months and then be asked to run for days. That long wait is exactly what wears it down: batteries lose capacity in the heat, fuel goes stale, rodents chew wiring and corrosion creeps into connections. A generator maintenance service visit is how you find those problems on a sunny afternoon instead of during a storm.
What a maintenance visit typically includes
- Oil, oil filter, air filter and spark plug service per the manufacturer's schedule
- Battery load test, terminal cleaning and charger check
- Inspection of belts, hoses, coolant (on liquid-cooled units) and wiring
- Fuel system check for leaks, pressure and water or sediment
- Controller review for stored fault codes and exercise settings
- Transfer switch test to confirm it shifts the load and returns to utility power
- Run under load so we see how the unit performs when it matters
How often to schedule it
Your owner’s manual sets the interval. Most home standby units call for service at least once a year, and many owners book theirs in spring so the generator is ready before Atlantic hurricane season opens on June 1. Commercial generators, units protecting medical equipment and systems that run often generally need more frequent attention. Facilities that fall under codes such as NFPA 110 have their own testing requirements, and our commercial generator team can plan around them.
For a deeper look at why a schedule pays off, read our article on the benefits of a generator maintenance plan.
Home Standby Generator Installation in Houston
A new standby generator is a significant project, and the details decide whether it works well for years or causes headaches. Our generator installation Houston service for homeowners starts with questions, not a sales pitch.
- Load reviewWe talk through what you want to keep running: the whole house, or essentials such as the refrigerator, HVAC, well or sump pump, lights and medical equipment.
- Sizing and siteWe help match generator capacity to that load and pick a location that respects manufacturer clearances, local rules and exhaust safety away from windows and doors.
- Fuel and transfer switchThe unit is connected to its fuel supply and to a transfer switch, so it can take over safely when the utility fails without backfeeding the grid.
- Startup and walkthroughWe start the system, test it under load, set the exercise schedule and show you what the controller lights and alerts mean.
Not sure what size you need? Our guide on what size generator to buy is a useful starting point before you call. Businesses planning a larger project should see our commercial installation and maintenance page.
Generator Repairs, Diagnostics and Parts
When a generator will not start, shuts down early or shows an error, the first job is finding the real cause. Our step-by-step generator troubleshooting covers batteries, fuel delivery, ignition, sensors, the controller and the transfer switch so we are not guessing.
Once the problem is clear you receive an upfront quote, and repairs move ahead with your approval. Many fixes involve a single component; for those, our generator parts and replacement service supplies OEM-approved parts such as batteries, starters, voltage regulators, filters and control boards, then tests the result.
Generator down in the middle of an outage? Skip the form and use our 24/7 line for emergency generator repair.
Commercial Generator Service for Businesses
Offices, retail stores, restaurants, warehouses and facilities face a different calculation: an outage can mean spoiled stock, lost sales, offline servers or a safety issue. Our commercial generator service covers installation, scheduled maintenance, load testing and repairs on commercial-grade units, with documentation you can keep on file.
Business owners and property managers can learn more on the commercial generator solutions page.
Which Service Fits Your Situation?
| If your generator… | Start with | Why |
|---|---|---|
| Hasn’t been serviced in a year or more | Routine maintenance | Catches worn parts before they fail during an outage |
| Won’t start, stalls or shows an error code | Diagnostics | Finds the root cause before any part is replaced |
| Failed during a power outage | Emergency support | 24/7 response by phone or text |
| Needs a known part such as a battery or regulator | Parts & replacement | OEM-approved components, installed and tested |
| Doesn’t exist yet | Installation | Sizing, placement, fuel, transfer switch and startup |
| Protects a business or facility | Commercial service | Scheduled programs, load testing and records |
One Call Covers It All
Homeowner or facility manager, you get the same approach: honest diagnosis, transparent pricing, upfront quotes and no hidden fees. Tell us what you need and we will take it from there.
Frequently Asked Questions
What is the difference between generator maintenance and generator repair?
Maintenance is planned work done while the generator is healthy, such as oil and filter changes, battery testing and load checks. Repair happens after something has failed or is throwing a fault. Regular maintenance catches many problems early, which usually means fewer repairs.
Do you install home standby generators?
Yes. We handle residential generator installation, starting with a review of what you want to power and where the unit can safely sit. We then set the generator, connect the transfer switch and fuel supply, and test the whole system before we leave.
How often should my generator get a maintenance visit?
Follow the interval in your owner's manual, which for most home standby units is at least once a year. Generators that run often, protect critical equipment or sit in heavy-use commercial settings usually need more frequent service. We can set up a schedule that matches the manufacturer's guidance.
Can you service a generator you did not install?
Yes. Our technicians work on most major makes and models regardless of who installed them. Share the brand, model and any error code when you call so we can arrive prepared.
Do you work on portable generators as well as standby units?
We do. Portable generators get the same careful diagnosis as standby systems, including fuel, carburetor, spark and output checks. If a portable unit is connected to your home, we also look at how it is tied in to make sure it is done safely.
Not Sure Which Service You Need?
Describe what your generator is doing, or what you want it to do, and we will point you in the right direction. Call or text 832-418-7218 any time, or email Jawillyservices@gmail.com.