Generac Generator Running When Power Is on: Solved!
Generac generators provide dependable backup power during unforeseen power outages. However, it’s not beyond any problematic issues. It can be concerning when a generator begins to operate spontaneously and for no apparent reason.
So, why Generac generator running when power is on?
Malfunctioning Automatic Transfer Switch (ATS) is the leading reason for running the generator when power is on. You need to repair or replace the component that is responsible to make ATS failure. Moreover, dirty or damaged fuel filters can lead to the issue as well. You need to clean or replace the fuel filters.
This article aims to explain the reasons in a deep manner. Additionally, you will receive practical suggestions and remedies to help you resolve this issue.
Contents
Generac Generator Running When Power Is On: Reasons And Solutions
If your Generac generator runs even when power is on, there could be multiple causes. It’s an issue like the Honda generator only runs with a choke on.
You need to find out the reasons. Otherwise, the main grid’s availability can lead to unnecessary fuel consumption.
Then, the continual operation of the generator can increase wear and tear. Also, generating the generator unnecessarily creates noise, which isn’t a good idea.
Therefore, it’s ultimate to jump onto the reasons and solutions without wasting time. Let’s take a quick look at them before we discuss them in more depth.
| Reasons | Solutions |
| Malfunctioning Automatic transfer switch (ATS) | Repair or replace |
| Clogged fuel lines and fuel filters | Clean or replace |
Now, it’s time to look into the deeper discussion regarding each of the reasons. And you can fix the issue yourself.
Reason 1: Malfunctioning Automatic Transfer Switch (ATS)
The leading reason is a malfunctioning Automatic Transfer Switch(ATS). In the event of a power outage, the ATS automatically switches from the utility to the generator. However, if it malfunctions, the generator can run even when the power is on.
Solution:
A diagnosis is needed in order to determine which component is malfunctioning in this system. You can do it easily by following the procedures given below.
Step 1
The first thing, you need to check is the circuit breaker. It supplies power to the ATS which switches between utility power and generator power. So, if the circuit breaker gets tripped, you need to change it as soon as possible.
Step 2
Then, check the Transient Voltage Surge Protector (TVSS) if it’s poorly shielding the ATS from the danger of Transient Voltage. If Transient Voltage enters the circuit board, it can cause damage to the control board. So, if you found the TVSS not working, you must replace the component.
However, if it already entered into the circuit breaker and damaged it, you must change the circuit board as well.
Step 3
At this point, you need to check the wires in the ATS controller. Inspect the control wires for any signs of looseness or poor connections. Ensure that the wires are firmly attached to their respective terminals.
ATS controller employs a two-wire start system. The relay remains open due to the utility power going out when the utility power goes out.
Basically, the closure brings two wires together, that trigger the generator. If these wires are loosened up, you need to tighten up the wires.
Gently tighten the screws or clamps holding the wires in place with a screwdriver. Remember one thing, overtightening can make the whole thing worst.
However, if the wires are damaged or not connected properly, the connection may fail. So, if the wires are visibly damaged, you need to replace them in this case. The damaged wire is also responsible for initiating the charger missing AC in the Generac generator.
Step 4
Now, you need to check the ATS controller to find out if it’s damaged or not. When the controller in an ATS is damaged, the generator may not receive the correct signals.
Hence, you can reprogramme the ATS controller to restore the functionality by a professional mechanic. Because it’s not something you can do for yourself. If still isn’t not working, you must replace the controller.
Step 5
Finally, you have to pay attention to the solenoids. Sometimes solenoids get dirty due to grime building up inside the generator over time. You need to clean the dirt.
You can do it easily at home by watching this video.
Then, if it’s not dirty, there is a high chance that the solenoid is damaged. Solenoids can sometimes cycle at a rapid pace. It leads to the accumulation of excessive heat which ultimately damages the solenoids. In this case, you need to replace the solenoid.
Reason 2: Clogged Fuel Filters
Another significant reason is having a clogged fuel filter. Dirt, debris, and sediment in the fuel can clog the fuel filter over time. Fuel cannot flow through the filter as a result.
The generator relies on a consistent fuel supply when it switches to generator power during a power outage. Clogged fuel filters can reduce or block fuel flow, which reduces the fuel supply to the engine.
Solution:
By keeping the fuel filter clean and clear, you can ensure a consistent fuel supply. If the power comes back on, you should avoid running the generator unnecessarily. To clean the fuel filters, go through the guidelines given below.
Step 1: First, turn off the generator and let it cool down before performing any task.
Step 2: Then, find the fuel filter near the fuel tank. It’s usually located in close proximity. Under the fuel filter, place a suitable container to catch any fuel spills.
Step 3: Now, take off the fuel filter. To do that you may need to use a wrench or screwdriver to loosen up the filters. You need to carefully disconnect any fuel lines connected to the filter.
Step 4: At this point, spray the fuel system cleaner on the fuel filters. Gently scrub the filter with a soft brush or cloth to dislodge stubborn particles.
Step 5: After cleaning, visually inspect the fuel filter for any remaining debris or damage. Allow the filter to air dry completely before reinstalling it.
If the procedure seems tough, you can take help from this video.
Let the generator run for a few minutes. If it runs smoothly operation and has uninterrupted fuel flow, congratulations! Otherwise, you need to replace the fuel filters.
There is another kind of filter in the generator which is thd filter. Stay alert so that you don’t mix up them.
Conclusion
Hopefully, you got a crystal clear idea regarding the Generac generator running when power is on.
It is crucial to accurately diagnose the underlying causes. Then, you should proceed with replacements without wasting time. Also, you need to be engaged in regular maintenance, monitoring, and testing of your Generac generator. Because it can help prevent future occurrences of such issues.
Frequently Asked Questions(FAQs):
Can you leave a generator running 24/7?
No, it’s not recommended to leave your generator running 24/7. Usually, a generator can run as long as it has adequate fuel apply. Generators consume fuel to produce electricity. Continuously running a generator can result in considerable fuel consumption.
Is there a recall on Generic Generator?
Yes, in October 2020, Generac recalled specific models of its portable generators. Because of fire hazards associated with fuel leakage. In June 2019, the company recalled certain models of its home standby generators.
What happens if the generator gets overloaded?
If the generator gets overloaded, the circuit breaker can trip automatically. Later the generator will be got disconnected from the unit from the load. You can resolve this by reducing the load and then resetting the generator’s breaker.
Why is my generator running when the power comes back on?
Your generator may continue running when the power comes back on due to a delay in the automatic transfer switch (ATS) or failure to detect the return of utility power. This issue can occur if the ATS is not properly calibrated or if there are problems with the utility power detection mechanism. It’s important to have a qualified technician inspect and adjust the ATS to ensure it functions correctly and automatically switches between generator power and utility power as needed.
