Code 33 on Onan Generators: Causes and Fixes

As a normal user, you must have found Onan generators to be quite reliable. However, like any machinery sometimes they turn things upside down for you. Error code 33 is probably one of the most common glitches experienced by users. If you are scratching your head over what it could mean and how to fix the problem, then you are in the right place. Let’s dig a little deeper into that error, what causes it and how you can go about troubleshooting and ultimately fixing it.

What Is Error Code 33?

Error on an Onan generator is always related to an overload scenario. If it determines that it is trying to pump more power to an appliance than its rating, it sets an error to prevent damage to the appliance or the generator. So it is basically a message to the user, really saying, “Wait a minute. You are asking too much of me!”

Causes of The Error

Understanding what causes this error can save you a lot of headaches. Here are some of the most common culprits:

• Overloading the generator: This is the most obvious reason. If you want to turn on a lot of appliances at once, your generator can’t do it.
• Worn electrical connections: Sometimes, the fault is not the load but the connections of everything. Bad connections can be loose and corroded areas that give false readings and hence make the generator think it is overloaded.
• Short circuit: It is possible that a short circuit has occurred in the system, causing the system to be overloaded.
• Faulty parts: The voltage regulator or some circuit boards or even the control panel of the generator can be faulty.
• Lack of maintenance: Like any mechanical device, it also needs regular checkups. Not doing so can lead to an accumulation of problems that can eventually become overwhelming.

How to Fix Error Code 33

Now that you know what error code 33 is and what might be causing it, let’s look at some practical steps to fix it.

Step 1: Reduce the Load

First things first, if you see an error, check what’s plugged into your generator. Make a list of all the appliances you’re running and their wattage. It’s a good idea to have a wattage meter handy, so you can see how close you are to your generator’s capacity. If you’re overloading it, unplug some devices and restart the generator.

Step 2: Inspect Electrical Connections

First, check your electrical connections. Always make sure all connections are strong and free of corrosion. Starting with your generator unplugged, inspect all connectors and wires for damage or corrosion. Once you find one or more that are damaged or corroded, clean or replace them.

Step 3: Check for Short Circuits

If the error still comes up after reducing the load and checking your connections, it’s time to check for short circuits. Look at all of your wiring. If you find some of your wiring exposed or if you see frayed insulation, you may be the culprit. Make any repairs you find and make sure your wires are well insulated.

Step 4: Examine Internal Components

If this fails then you need to dig into the generator. You should check the internal parts, especially the voltage regulator and the board that contains the circuits. If you feel uncomfortable doing this then call a professional for the job, as the components are sensitive and are best handled by a professional who knows how to diagnose and fix them.

Step 5: Perform Regular Maintenance

Finally, to prevent error from happening in the future, make regular maintenance a priority. Here are a few maintenance tips:

• Oil change – It is just as if your car. The generator needs periodic oil changes.
• Replace or clean the fuel and air filters to ensure most efficient working.
• Visual inspections Systematically observe the generator for signs of wear and tear. This may alert you to probable problems before they grow major.

Final Thoughts

When things get to the point that you have to deal with error code 33 on your Onan generator, it can be quite frustrating, unless you understand a bit about the technical aspects and start troubleshooting. These tips are only a part of the ways to solve some problems before they become big headaches: reduce load, check connections and perform regular maintenance.