Generac Generator- Blowing Fuse Problem

A blowing fuse indicates that there is a serious issue with the generator. The same happens with a Generac generator. If not treated on time, it can lead to severe problems.

Why does my Generac generator keep blowing fuse?

The Generac generator when keeps blowing fuse indicates an underlying issue that needs to be resolved urgently. It may be due to electrical overload or any fault in the fuse.

The Generac generators commonly have this blowing fuse issue. Before fixing it, you have to find out whether the issue is overloading or simply in the fuse.

What are the most likely causes of a Generac generator’s blowing fuse?

Out of the various problems associated with a generator, blowing fuse is the most irritating one. The fault can be in the wiring between the transfer switch and the generator.

Some of the most likely causes of blowing fuse problem in generator include:

  • Overloading of electric current
  • A short circuit in the system, resulting in a ground fault.
  • An incorrect fuse size is installed.

Any of these issues will cause an abnormal flow of electricity, melting the wire ribbon in the fuse and rapidly breaking the circuit.

What is the purpose of fuse in a Generac generator?

A fuse is an essential component of every generator, in fact for every electrical appliance. It is basically a circuit protection device that acts as a weak link to avoid current overload.

Fuses ensure that excessive current does not pass through a circuit and destroy connected appliances. Fuses protect the circuit wires from igniting a fire in case of an electrical malfunction by preventing overcurrent.

What are some of the common causes of generator failure?

The most common cause that results in generator failure is improper maintenance. The lack of care and accumulation of dust leads to the failure of your appliance.

Even the most reliable generators may start to fail due to the following reasons:

  • Poor Maintenance

Because a generator system might cost tens of thousands of dollars, you’ll want to make sure it lasts, if possible, by doing routine maintenance.

Maintenance should be performed at least once every three months, however, there may be times when it is required sooner, such as in inclement weather.

  • Low Coolant

Your engine’s coolant stops it from overheating. Allowing an engine to run too hot may cause it to break down quickly, so check the temperature levels periodically. You may have a leak in the system if you discover that you are using more coolant than usual.

During your routine examination, keep an eye out for any noticeable puddles. If you suspect a leak, get the unit inspected by a skilled technician to rule out any other potential problems.

  • Dirt in filters

Filters capture all the dirt, dust, and other material drifting around your generator. Filters can become clogged and less effective if they are not cleaned on a regular basis.

Small particles could get inside your generator and cause damage to its components. Filters that dirty impede airflow, requiring the engine to work more to accomplish the same task. This can place the unit under unnecessary strain, potentially resulting in a breakdown.

 Therefore, filters should be cleaned and replaced on a regular basis to keep your generator in good working order and avoid any potential breakdown.

How to troubleshoot a Generac generator?

Generac generators are of high quality designed to provide maximum portability. Sometimes short circuits, electricity outages, or overloading may cause problems. And when you discover any problem, it should be treated immediately. Therefore, it is important that you know how to troubleshoot your generator.

You can avoid these problems with a few precautionary steps:

  • If the generator is overheating, the high temperature light will illuminate. Unscrew the oil lid on the crankshaft and pour a liter of certified motor oil into the unit if the light is illuminated. This should be done after the unit has been turned off.
  • Make sure to adjust the fuel valve if the generator is running roughly.
  • Make sure the unit is set up correctly for running. A tripped circuit breaker is often the source of a problem, so check the AC receptacles on your Generac home generator to see whether the front button is protruding out.

Related questions

Why does my appliance always blow fuses?

When circuit breaker trips or blown fuse frequently, it is an indication that you are overloading the circuit and should shift some appliances and equipment to another circuit. Alternatively, it could signal that your home has too few circuits to manage the load and requires a service upgrade.

Why is my Generac generator always shutting down?

Your generator may shut down if the oil level is too low. When oil levels are low, newer generator models, such as Generac’s, feature a “low oil shutoff sensor” that automatically shuts off the generator.

Why is it that my generator runs but does not generate electricity?

The loss of residual magnetism is the most prevalent cause of portable generators failing to produce energy. Electrical conductors are moved through a magnetic field by generators.

Magnets are not present in your generator. The generator will produce no electricity at start-up if the residual magnetism is dissipated.


Generac generators are well-known for their efficient technology and performance. Sometimes, the fuse may cause a problem.

If your Generac generator keeps blowing fuses, the problem is most likely a current overload, a short circuit, or a ground fault in the circuit. If none of this is the case, make sure you’re using the correct size fuse, as an “under-rated” fuse can keep blowing.

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