How to Get Your Onan Generator Repaired

A working Onan generator is essential for keeping your RV systems running smoothly on the road. But when it malfunctions, it can put a major dent in your plans. From powering appliances to keeping the climate control running, your generator supports many critical RV functions. If you need Onan generator repair, you may be wondering where to start and what steps to take to get it back in working order. 

This guide from our team at Mainline Truck covers all you need to know about diagnosing, finding a reliable Onan generator repair shop, and working with professionals to get it operating again.

Step 1: Diagnose the Issue

Before seeking a professional for repairs, it's helpful to do a preliminary diagnosis of your Onan generator's problem. Some common issues include fuel system troubles, electrical malfunctions, and general wear and tear from lack of regular use.

Start by conducting a visual inspection. For minor issues, your RV manual can offer troubleshooting tips specific to your generator model. However, if the problem seems to exceed basic maintenance, it’s best to move to the next step.

Step 2: Research Reliable RV Repair Shops

Once you’ve assessed the issue, it's time to research repair shops that specialize in RV generators. While there are several repair shops in most areas, not all have experience working with Onan generators. Here’s how to find a qualified service provider:

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  Use Online Reviews: Yelp, Google reviews, and RV forums are great places to find local recommendations.
• Ask for Recommendations: Reach out to RV communities, either online or locally, for advice on reliable repair shops.
• Check Their Warranty Policy: A reliable repair shop will usually offer a warranty on parts and labor. This can provide peace of mind that the repair will be done properly, and they’ll stand behind their work if any issues come up afterward.

Step 3: Contact the Professionals

After narrowing down your options, give each shop a call to discuss the issues you're experiencing. Ask questions to understand their expertise with Onan generators, and inquire about their availability and usual turnaround times. Calling them can also give you insight into their customer service. A knowledgeable and responsive team indicates a reputable repair provider.

Step 4: Verify Credentials

Not all repair shops have the same qualifications, so make sure you verify that the one you choose is competent in repairing  RV generators. It’s best to find a shop that is an authorized service and warranty center for Onan generators. This can help ensure that your Onan generator is repaired by skilled professionals who follow industry best practices.

Step 5: Schedule an Appointment

After confirming that a shop meets your standards, schedule an appointment. Be prepared to provide details about your generator, including its make and model, and any symptoms you've observed. This information allows technicians to perform an accurate diagnosis and begin repairs right away. It's also a good idea to ask about estimated timeframes, so you know when to expect your generator back.

Step 6: Stay Updated During the Repair Process

Once the repair is underway, communication with the repair shop is important. A good provider will keep you updated on progress, especially if additional issues are found or repairs will take longer than expected. Be sure to ask for clarifications on any part of the repair process or technical terminology you don’t understand. Not only does staying updated provide you with peace of mind, but it also builds trust between you and the repair team.

Key Considerations When Choosing Between Repair or Replacement

If your Onan generator has recurring issues or has already undergone multiple repairs, it might be time to weigh the costs and benefits of repairs versus replacement. Here are a few factors to consider:

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  Age of the Generator: Onan generators are built to last, but if yours is over a decade old, replacement might be a better long-term investment.
• Frequency of Repairs: If you find yourself visiting the repair shop frequently, you may end up saving money in the long run by replacing your generator instead of continually investing in repairs.
• Parts Availability: For older models, finding replacement parts could become difficult and expensive. Consider whether the parts are readily available or if it would be more cost-effective to upgrade to a newer model with easily accessible components.
• Energy Efficiency: Newer models are usually more fuel-efficient, which can save you money on energy costs during long trips. Consider if a newer generator could offer cost savings over time.

Top Tips to Prevent Future Onan Generator Problems

While Onan generator repairs can sometimes be unavoidable, regular maintenance can help reduce the chances of future breakdowns. It can especially help if you rely on your generator for lengthy road trips or RV adventures. Here are some key preventive steps for keeping your generator in good shape:

1. Exercise Your Generator Regularly: Running the generator for a short period every few weeks prevents fuel from stagnating and helps keep parts lubricated.
2. Use Fuel Stabilizers During Storage: If your RV will be sitting idle, add a fuel stabilizer to prevent fuel from deteriorating.
3. Keep up with Oil Changes and Filter Replacements: Regularly changing the oil and filters can prevent debris buildup and protect the engine.
4. Check Battery and Connections: Make sure the battery is fully charged and inspect all cables and connections to avoid power issues.

Advanced Tools and Technologies to Enhance Onan Generator Maintenance

With advancements in technology, there are several tools and features available to simplify Onan generator upkeep:



• Diagnostic Software: Many modern generators come with diagnostic software or can be serviced with advanced tools that detect issues early on.
• Remote Monitoring: Some generators allow remote monitoring of fuel levels, runtime, and errors. They provide live data to help with preventive maintenance.
• Service Apps: Many service apps can simplify scheduling maintenance, tracking generator history, and receiving alerts when issues come up.

Incorporating these technologies can streamline the maintenance process and ensure your Onan generator stays in peak condition with minimal hassle.

Frequently Asked Questions for Onan Generator Owners

Owning an Onan generator comes with a few common questions. These FAQs can provide quick solutions to minor issues, but for larger problems, consulting a repair shop is often best. Here are answers to some of the most frequent inquiries from RV owners:

• Why does my generator start but then stop running?

This often occurs due to oil pressure issues or a lack of AC voltage. It can also stem from a stuck oil pressure switch, which might need replacing.

• What’s the best way to prevent fuel-related issues?
  Running your generator periodically and adding a fuel stabilizer during storage can prevent fuel problems.

• Why does my generator run rough or emit smoke?
  This may indicate carburetor or spark plug issues, or even a stuck choke. Adjustments and replacements in these areas can resolve the issue.

• What if nothing happens when pressing the start switch?
  This issue could indicate a fully discharged coach battery or faulty wiring. Check the battery and control fuse to rule out a simple fix.

• What causes a clicking sound when I try to start the generator?
  This usually signals a low or failing battery. Check connections, the battery cable, or the starter solenoid, and replace them if needed.

• Why does the generator crank normally but not start?
  This could be because of fuel or ignition issues. Test the engine by spraying a small amount of starter fluid into the air intake; if it tries to run, the issue is likely fuel-related.

Contact Mainline Truck to Schedule Onan Generator Repair Service Today!

Experiencing issues with your Onan generator can be a stressful roadblock, but finding a reliable repair service doesn’t have to be. Whether it’s routine maintenance, a minor fix, or a complex repair, taking the right steps to diagnose, find a reputable shop, and communicate with professionals will help get your RV back on the road quickly. If you need expert assistance, Mainline Truck offers professional Onan generator repair services to help you keep your adventures on track. 

Contact us today to schedule an appointment and ensure your Onan generator is ready for your next road trip!