How To Bypass Co Sensor On Generator

How To Bypass CO Sensor on Generator?

If your generator’s CO sensor starts beeping or blinking, it indicates potential exposure to harmful Carbon Monoxide levels. Therefore, understanding how to bypass CO sensor on generator becomes crucial.

The procedure is rather easy to follow. Find the CO sensor first. After the generator has had a chance to cool, could you turn it off? Restart the generator after disconnecting the sensor, and if it is broken, think about replacing it. This post provides various insights on bypassing the CO sensor on a generator for your reference.

5 Easy Steps – How To Bypass CO Sensor on Generator?

How to Bypass CO Sensor on Your Generator:

Examine the CO Sensor

  • Find the CO sensor, which may be located in various locations depending on the generator type.
  • It’s usually near the exhaust but could also be inside the control panel or nearby.
  • Look for labels or consult the manual to find them.
Co Sensor On Generator
CO Sensor on Generator

Let the Generator Cool

  • Please turn off the generator and let it cool to room temperature to avoid burns from hot parts.

Disconnect the Sensor

  • Remove screws to access the sensor’s wires.
  • Disconnect the sensor carefully, and consider getting a new one if needed.

Start the Generator

  • Test it in a contained space to ensure that the generator operates without any issues. If the CO sensor was the problem, this may be used to prove it.
  • If the generator runs well, you’ve successfully bypassed the CO sensor.
  • Restart the generator to make sure it’s working properly.

Replace a Broken Sensor (if necessary)

  • If you find the CO sensor is broken or not working correctly, buy a new one and replace it. 

These steps help you bypass or change the CO sensor on your generator test, keeping it safe to use.

What Functions Does a Generator’s Co-Sensor Have?

A generator’s CO (carbon monoxide) sensor keeps you safe by noticing if there’s too much CO gas in the air. CO is a dangerous, invisible gas produced when the generator runs on fuels like gasoline or propane. When generators are used indoors or in places with bad airflow, it can be a problem because CO can make you very sick or even kill you.

A generator’s CO sensor typically functions in two ways:

Electrochemical Sensors: 

These sensors have special stuff in them that reacts to CO. When CO goes into the sensor, it makes a small electric current. How strong the current is tells us how much CO is around.

Metal Oxide Semiconductor (MOS) Sensors: 

These sensors feature a component that modifies its electrical conductivity in response to the presence of CO. More CO means bigger changes in how it conducts electricity.

Here’s how the CO sensor on a generator usually works:

  • It checks the exhaust gases from the generator while it’s running.
  • If it finds CO, the sensor reacts and makes an electrical signal. A computer or control device monitors this signal and also sets a safety limit for how much CO is safe.
  • If CO levels go too high, the computer can make alarms go off or do something to keep you safe, like turning off the generator.

CO Sensor Bypass: Essential Safety Checklist

Before you do anything to bypass the CO sensor and stop Carbon Monoxide from forming, make sure to do these important things:

  1. Ensure there’s enough fresh air around the generator, and don’t put anything that can catch fire near where the exhaust comes out.
  2. Wait until the generator is not too hot before you do anything.
  3. Keep at least 3 feet of space around the generator so it works well, stays cool, and can be fixed easily.
  4. Never attempt to start a broken-in generator. Ensure the fuel cap, spark plug, air filter, fuel lines, and exhaust system are all set up correctly.
  5. Read the manual that comes with the generator to know what to do.
  6. If there’s a problem with the CO sensor, replace it.
  7. Put on safety gear like a mask, gloves, and goggles.
  8. Figure out why the CO sensor is having a problem before you do anything to stop it.

Alternative Processes of Bypass CO Sensor Method?

Instead of bypassing the CO sensor, there are safer ways to make sure your generator works well and doesn’t produce too much of the harmful gas called carbon monoxide (CO):

Clean or Change the Air Filter

Sometimes, a dirty air filter can make the generator work poorly and create more CO. Cleaning or installing a new air filter can help the generator work better and produce less CO.

Check the Fuel System

If the fuel system in your generator is not working right, it can also make too much CO. Ensure the fuel system is clean and works well to reduce CO emissions.

Upgrade the Exhaust System

A better muffler or a catalytic converter can help reduce CO emissions and improve the generator’s work.

Get Good Ventilation

When you use a generator, it’s important to have good airflow around it. Put the generator in a place with plenty of fresh air, away from doors and windows. This stops CO from getting into your home or workspace.

Also, there are other options you can think about:

Battery-Powered Portable Power Stations

These are like small, safe generators that don’t make harmful gases. You can use them inside, and they work for short-term power needs.

Solar-Powered Generators

These are environmentally friendly and safe indoors because they don’t make CO or other bad stuff. They also use the sun to make power, which is pretty cool.

Propane or Natural Gas Generators

These generators are safer than the ones that use gasoline. You don’t have to store gasoline, which is safer, and they don’t produce as much CO.

Power Inverters

These change the kind of electricity your car’s battery or other things make into the electricity you can use in your home. They’re good for powering small stuff like phones or appliances.

All Brand Generators’ Co-Sensor Bypass

Using a CO sensor from a different brand, like Generac, Gentech, or WEN, is not usual in a generator. You should use caution if you have to do this. You might have to do this if the sensor isn’t working right or in an emergency, but it’s risky because it turns off an important safety feature that detects a dangerous gas called carbon monoxide (CO). It means you could breathe in CO without knowing it. If your sensor is broken, it’s best to ask the generator manufacturer or a certified technician for a safe fix. Always use your generator in a place with good airflow, have a CO detector nearby, and watch out for signs of CO poisoning.

Can whole-house generators release carbon monoxide?

Yes, big generators for your whole house can make a gas called carbon monoxide (CO). But don’t worry, they usually have safety things in them to stop you from getting sick from CO. These safety things have sensors that check the air for CO. If they find too much CO, they turn off the generator to keep you safe.

Why Do CO Detectors Stop Working?

CO detectors stop working because their sensors get worse over time. When they’re not good, they can’t detect if there’s CO around, and that’s not safe. So, changing them is important, usually every 5-10 years.

Can You Find CO Without a Detector?

It’s hard to find carbon monoxide (CO) without a CO detector because you can’t see, smell, or taste it. But sometimes, if there’s too much CO, you might get headaches, feel dizzy, throw up, or get confused. These are signs that there might be CO, but they could also be because of other things. So, it’s safest to have a CO detector to know if CO is around.


  • Can a Carbon Monoxide Detector Be bypassed?

    You can get around a carbon monoxide detector by cutting off the power or covering the sensor, but doing so is risky and not advised.

  • Does My Generator Need a CO Sensor?

    The CDC reports over 400 CO-related deaths annually in the USA. Modern generators have CO sensors that detect dangerous CO levels and automatically shut down. It’s important to have a CO sensor for a generator to prevent potential leaks. If not maintained properly or used in poorly ventilated spaces, the generator can produce CO. The sensor issues a critical alert.

  • How Can a Generator Not Produce Carbon Monoxide?

    To prevent carbon monoxide (CO) exposure from a generator:
    _ Follow these safety measures.
    _ Place the generator outside in a well-ventilated area.
    _ Keep it dry and maintain a safe distance from your home or workspace.
    _ Use a CO detector, and never use it indoors.
    _ Regularly inspect and service the generator.

  • If Your Generator is Outside, May You Get Carbon Monoxide Poisoning?

    You can still get carbon monoxide poisoning even if your generator is outside. This can happen in a poorly ventilated area or close to open windows or doors. Following safety guidelines like putting your generator in the right spot and using CO detectors is important.

  • How Do You Reset a Co Sensor on a Generator?

    If you want to make a CO sensor on a generator work again, it’s best to look in the manual that came with it. Usually, there’s a button close to the CO sensor that you can press to make it forget about the carbon monoxide. Wait a bit after pressing it, and it should be okay again.

  • How Can I Check the CO Sensor?

    To check the CO sensor, do these steps:
    _ Examine it attentively to check for damage.
    _ Press the alarm button to test it.
    _ Check the expiration date.
    As the manufacturer suggests, getting a new CO detector every 5-7 years is important.

  • How Often Should I Change the CO-Minder Sensor?

    It would help if you changed the CO-Minder sensor every 5-10 years, depending on how good it is and what the instructions from the company say. Look in the user manual to be sure.


Ensuring the safe operation of your generator is paramount, especially concerning carbon monoxide (CO) exposure. When faced with a malfunctioning CO sensor, knowing how to bypass a co-sensor on a generator can be a valuable skill. However, this process should be undertaken cautiously, following safety protocols and considering alternatives to minimize CO emissions. Always prioritize safety, maintain proper ventilation, and adhere to manufacturer guidelines to keep your generator operation hazard-free. Remember that using generators responsibly is essential for your health and the safety of those you care about.

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