How To Troubleshoot Backup Generator Issues?

How To Troubleshoot Backup Generator Issues?

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Key Takeaways:

  1. Core Home Innovations provides helpful tips for troubleshooting common generator problems.
  2. Fuel supply problems, the engine won’t start, or a faulty control system may be the issue if the generator isn’t receiving power.
  3. If the battery is more than five years old, it’s likely time to replace it.
  4. The generator may stall during operation due to fouled spark plugs or dirty filters – ensure you regularly replace spark plugs and check/change filters as needed.
  5. Clogged fuel pipes can be caused by dirt and debris buildup – remove fuel lines and clean out any blockages before restarting the generator.
  6. Overheating of the fuel pump may occur if there is insufficient circulation around the pump – inspect all components near the pump for damage and check fuel pressure levels.

Have you ever experienced a power outage in your home or business and had to rely on a backup generator to keep things running smoothly? While backup generators can be a lifesaver during an outage, they can also be prone to issues and malfunctions.

In this blog post, Core Home Innovations will go through some common issues with backup generators and provide tips and tricks for troubleshooting and fixing them. So, if you’re looking for helpful guidance on keeping your generator running smoothly, read on!

Knowing your generator’s ins and outs will help you troubleshoot any issues that arise quickly. It is essential to understand how diesel or petrol generators work so that you can resolve their problems swiftly.

Common Generator Problems & Their Solutions

1. No Power Output

There could be a few issues causing your generator not to produce electricity. You might be dealing with a fuel supply problem, the engine won’t start, or a faulty control system. Let’s take a look at each potential issue:

a) Fuel Supply Problem – If your generator isn’t receiving enough fuel, it will start but quickly stall as soon as it runs out of gas. To fix this issue, check the fuel lines and ensure they are not clogged or blocked by debris. Also, ensure the tank has enough diesel or petrol for the generator to run correctly.

b) Engine Won’t Start – A faulty spark plug can prevent the engine from operating correctly. If you suspect that this is the case, swap the spark plug with a new one and try starting the engine again. You should also check the battery to ensure it has sufficient charge and that all cables are correctly connected.

c) Faulty Control System – The generator will not function if there are any faulty components in its control system. Check for broken wires or corroded terminals. Replace them if necessary to fix any issues. Additionally, inspect the circuit board for any signs of damage, such as melted insulation or burned connectors. Repair or replace these components as needed to restore functionality to your backup generator.

2. Generator Battery Failure

Batteries are the lifeblood of a generator, and when they fail, the generator will not start. If your battery is more than 3-5 years old, it’s likely time to replace it. Ensure the new battery has the same voltage rating as the old one, and check that all cables are properly connected before installing.

3. Generator Stalling During Operation

Nothing can be more frustrating for a generator owner than when it fails to start or stalls shortly after ignition. It’s especially disheartening during a power outage, where you’re relying on your generator to bring some peace of mind and lighten the mood in your home – only to leave you disappointed again and again by stalling with no warning.

There could be several reasons your generator begins to run but then unexpectedly shuts down. For example, fouled spark plugs in natural gas generators may prevent the unit from generating enough energy to keep it running. Spark plug deterioration is mainly an issue with natural gas-powered systems, as diesel engines do not have any spark plugs. To ensure your natural gas generator’s continuous operation and performance, we recommend replacing its spark plugs every 100 hours.

In addition, verify that the generator’s filters are performing optimally. Oil filters remove any contamination from engine oil that can otherwise pile up and cause damage to the engine in time. The air filter allows fresh air into the system for fuel compression and burning; change these if worn or dirty to ensure the efficient operation of your generator.

4. Clogged Fuel Pipe

If your backup generator is having difficulty starting, it may be due to a clogged fuel pipe. When the generator has been in storage for a long time, dirt and debris can accumulate in the fuel system, causing difficulty in the startup. In such cases, it’s best to take apart the fuel lines and check if they are blocked. Clean out any blockages before reassembling and restarting the generator.

Related: The Power Struggle: Whole House Generator Vs. Backup Battery

5. Overheated Fuel Pump

Another common issue with backup generators is an overheated fuel pump. To prevent this from happening, ensure that the fuel line does not develop kinks – as these can reduce fuel flow and cause a buildup of heat inside the pump. Additionally, inspect all other components near the pump for signs of damage and check the fuel pressure. If it is not at the right level, then that could be causing the pump to overheat.

6. Low Oil Level

Damage due to low oil levels is one of the most common issues with residential backup generators. To ensure the safe operation of your generator, always keep an eye on the oil levels and top up when necessary. It’s also important to regularly change your engine oil for optimal performance and protection from wear and tear.

7. Poor Ventilation

Generators need ventilation to stay cool – but if there isn’t enough air circulation around it, this can cause problems like overheating or decreased performance. Ensure you provide proper ventilation when operating a generator to avoid potential issues.


8. Wrong Fuel Type

Using the wrong fuel type can also lead to problems with your generator – check the manual and use only what is specified for optimal performance. Using gasoline or diesel instead of propane can cause severe damage, so always double-check before topping up your tank.


Troubleshooting a backup generator can be tricky, but with the right tools & knowledge, you can diagnose and solve most issues. Above are some of the most common generator issues and their solutions. With proper maintenance and care, you should enjoy years of reliable power from your home’s backup generator without any problems.

Core Home Innovations Is Here to Help You

Core Home Innovations is proud to provide you with the perfect whole-home generator for your home in Conroe, regardless of size or style! Our wide selection of models guarantees that there is one perfectly suited to your needs. Crafted from only top-quality materials and built using rigid construction standards, our generators have been tested to ensure they will last you years. Invest in a Core Home Innovations whole-home Generator today and enjoy reliable power anytime!

Setting up your new generator is a breeze, and our team of professionals will assist you every step of the way. With your installation complete, power outages won’t be an issue! Additionally, full service and support are just a phone call away so that you can rest assured knowing that your generator remains in optimal condition at all times. Get a free quote.


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