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Geekbitz.com > Tech > How to Bypass Co Sensor on Generator: A step by step Guide
Tech

How to Bypass Co Sensor on Generator: A step by step Guide

Brian
Last updated: April 14, 2025 5:01 pm
Brian
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If your generator’s carbon monoxide (CO) sensor frequently alarms or triggers automatic shutoff with a red warning light even in well-ventilated areas, this could indicate a malfunctioning sensor that needs professional inspection and calibration.

While sensor issues can be frustrating, it’s crucial to understand that CO sensors are critical safety devices that protect against deadly carbon monoxide gas. Never disable or bypass these sensors, as doing so could put lives at risk. Instead, have a qualified technician test and repair the sensor if needed.

Let’s start by understanding what a CO sensor is and how it helps keep you safe…

What Is a Co-Sensor on a Generator?

A carbon monoxide (CO) detector is a vital safety device that continuously monitors the air for the presence of CO gas.

When dangerous concentrations are detected, the sensor triggers a dual-response system: an audible alarm alerts nearby people, while an automatic shutdown mechanism immediately stops the generator to prevent further CO production.

Carbon monoxide is particularly dangerous because it’s completely invisible and odorless. Without a working detector, there’s no way to know you’re being exposed until symptoms begin—and by then, it might be too late.

The gas binds to your blood cells more readily than oxygen does, which can quickly lead to oxygen deprivation in vital organs.


How Modern CO Sensors Work: Today’s CO sensors use sophisticated electrochemical technology to detect even small changes in carbon monoxide levels. When CO molecules interact with the sensor’s detection element, it triggers an electrical signal proportional to the gas concentration. This allows for:

  • Early warning before CO reaches critically dangerous levels
  • Accurate measurement of CO concentration in parts per million (ppm)
  • Reliable automatic shutdown when unsafe thresholds are reached
  • Real-time monitoring with digital displays on many models

Location and Installation Requirements: For optimal protection, CO sensors on generators are strategically placed to monitor exhaust emissions and ambient air quality.

They’re designed to be:

  • Protected from direct exposure to elements that could affect readings
  • Positioned to detect CO levels before they reach the operator
  • Integrated with the generator’s control systems for immediate shutdown capability
  • Easily accessible for regular testing and maintenance

Maintenance and Testing: To ensure your CO detector continues to provide reliable protection:

  • Check the sensor monthly using the built-in test function
  • Replace the detector according to manufacturer specifications (typically every 5-7 years)
  • Keep the sensor clean and free from dust or debris
  • Never cover or obstruct the sensor’s air intake ports

These modern safety features represent a crucial advancement in preventing carbon monoxide poisoning and protecting users from this silent but deadly threat.

How do I bypass the sensor on the generator?

  • The generator needs to be switched off and then left idle until it reaches normal room temperature alongside every part of the device.
  • Check the position of the CO sensor because it frequently rests inside the control panel for removal and find where the CO sensor wires attach to a small white containment device for disconnection.
  • The generator startup should continue if you successfully bypassed the system.
  • Obtain a new CO sensor for replacement when the damaged one requires removal.

Why Do I Need to Bypass the Co Sensor?

If your generator operates normally after temporarily disconnecting the CO sensor, it suggests that the sensor itself may be faulty.

However, it is crucial to remember that carbon monoxide sensors are essential for safety, especially when operating a generator in an enclosed space.

Bypassing the sensor should only be considered a temporary troubleshooting step if you suspect it is interfering with the generator’s proper functioning.

Important Note: Prioritize safety over all else.

If you have any concerns about generator operation or carbon monoxide levels, consult a qualified technician or refer to the generator’s operating manual for guidance.

Do I Need a Co-Sensor on My Generator?

A functioning CO sensor is essential for generator safety.

If your generator doesn’t have a built-in CO sensor, it’s crucial to install a separate, high-quality carbon monoxide detector before operation – especially when using the generator near any living spaces like homes or RVs.

Safety Tips

  • Always operate the generator in a well-ventilated area, away from any heat sources or flammable materials. Allow the generator to cool down to room temperature before handling it.
  • Before starting any troubleshooting or maintenance, carefully read the owner’s manual for specific instructions and safety guidelines.
  • If the issue is determined to be a faulty CO sensor, replace it immediately. Operating a generator without a functioning CO sensor can be extremely dangerous and may result in serious penalties.
  • Familiarize yourself with all relevant local laws and regulations regarding generator operation and safety

Do Whole House Generators Give off Carbon Monoxide?

Any type of generator, whether it’s a portable one or the bigger permanent ones that power your whole house, gives off carbon monoxide.

This is really important, so before you get one of these whole-house generators installed, please make sure to follow all the safety steps carefully. Your safety matters!

Wrapping Up

If your carbon monoxide detector keeps beeping or shuts your generator off, you might need to check what’s wrong.

But if the detector is broken, just buy a new one—don’t try to work around it.

These detectors can save your life, especially if your generator isn’t in a good spot. That’s why I play it safe—I have detectors in my house and RV, even though my generator sits far from my house.


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By Brian
Hello, I’m Brian. I’m a creator, designer, and the owner of the GeekBitz blog. I have a Computer Science background and taught myself digital marketing to fund my artistic pursuits. Now am addicted to developing products and building partnerships.
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