A working RV generator powers your appliances, keeps your air conditioner running, and ensures you stay comfortable on the road. Whether you travel full-time or take seasonal trips, your generator needs regular care. At TX RV Repair, we help Houston-area motorhome owners keep their generators in top shape through preventive maintenance, repairs, and system testing.
Our expert team understands how critical a dependable generator is for your trip. This guide explains how to maintain your RV generator, when to service it, and what signs to watch for.
What Does an RV Generator Power?
Your RV generator supplies electricity to the systems that make your motorhome livable. This includes:
- Air conditioner
- Refrigerator
- Microwave
- Interior and exterior lighting
- Power outlets and phone chargers
- TV and entertainment systems
Whether you drive a Class A, Class B, or Class C motorhome, the generator gives you off-grid freedom. Without the proper equipment, you’re limited to campground hookups or battery power.
How Often Should I Run My RV Generator?
Running your generator regularly keeps the internal parts lubricated, prevents fuel system clogs, and protects electrical components from moisture.
Recommended schedule:
- Once per month
- At least 1 hour
- Under electrical load (run the A/C or microwave)
Letting the generator sit idle for months can lead to fuel gumming up in the carburetor. Moisture can also build up in the windings. Monthly use helps prevent both issues.
How Do I Test My RV Generator?
Testing your RV generator is simple. You don’t need special tools to perform a basic monthly test.
Steps to test your generator:
- Start the generator.
- Listen for any strange sounds like knocking or grinding throughout the generator.
- Let the generator run for 15–30 minutes.
- Turn on any of the major appliances in the vehicle, like the A/C or microwave.
- Watch for warning lights or changes in performance.
- Turn off the generator after a full hour of use and let it cool down.
If it fails to start, stalls under load, or makes unusual noises, contact a professional. TX RV Repair can inspect and diagnose generator problems quickly.
Why Should I Run the Generator Under Load?
Running under load means using the generator while powering appliances. This is important for several reasons:
- Keeps the alternator and voltage regulator working properly
- Burns off carbon buildup in the combustion chamber
- Ensures it performs as expected during real use
- Maintains oil pressure and engine temperature
Running the generator without a load (just idling) does not fully exercise the system. Monthly load tests mimic real-world use and extend generator life.
Common RV Generator Problems
Generators are built to last, but several problems can reduce performance or stop them from running:
- Hard starting: May indicate fuel varnish or old spark plugs
- Low power output: Often caused by clogged filters or a weak voltage regulator
- Stalling under load: Can mean fuel delivery problems or a failing carburetor
- Oil or fuel leaks: Require immediate attention
- Excess noise or vibration: May signal loose mounts or internal wear
- Tripped breakers or flashing fault codes: Point to electrical issues
Addressing these problems early can prevent larger and more expensive repairs down the road.
RV Generator Maintenance Schedule
Regular maintenance keeps your generator ready for every trip. Follow this schedule for best results:
Monthly Tasks
- Start and run the generator for at least one hour
- Run appliances to simulate real use
- Check for leaks, smells, or strange sounds
Quarterly Tasks
- Check and top off oil level
- Inspect air filter and wiring
- Perform a load test
Annual Service
- Change oil and oil filter
- Replace air filter
- Inspect fuel lines and connectors
- Clean terminals and generator housing
- Check exhaust system for cracks or blockage
Tip: Always use fresh gasoline and add a fuel stabilizer during storage months.
How to Store Your Generator During Off-Season
If your RV will sit unused for months, take steps to protect your generator.
- Add fuel stabilizer to the tank
- Run the generator to circulate the treated fuel
- Shut off the fuel valve and run it dry to prevent varnish
- Disconnect the battery if it won’t be charged regularly
- Store in a clean, dry space with proper ventilation
Proper storage prevents fuel breakdown, battery drain, and moisture damage.
When to Call an RV Generator Expert
Some issues require more than basic troubleshooting. Contact TX RV Repair if:
- Your generator won’t start or stay running
- It stalls when powering appliances
- You see fluid leaks or smell fuel
- A fault code appears on the control panel
- The vehicle is due for annual service or inspection
Our team can diagnose mechanical, fuel, and electrical problems. We service both built-in and portable generator systems.
How Long Do RV Generators Last?
A generator for an RV can last between 1,500 and 3,000 hours with regular maintenance. You can track the usage of your equipment by checking the built-in hour meter.
Tips to extend lifespan:
- Follow the maintenance schedule
- Run monthly under load
- Keep filters and oil clean
- Store properly between trips
Replacing a generator is expensive. Routine maintenance helps avoid major repairs and protects your investment.