What should I do if my generator shuts off?
Andrew Mitchell
Published Feb 09, 2026
What should I do if my generator shuts off?
If the generator runs then shuts off it may be a temperature issue. Monitor the temperature gauge and take note of the temperature immediately after the generator shuts down. Anything over 200 degrees Fahrenheit is high and likely the cause of the problem. Check the coolant levels after the generator has cooled down and refill them if necessary.
What should I do if my propane generator is not working?
Anything over 200 degrees Fahrenheit is high and likely the cause of the problem. Check the coolant levels after the generator has cooled down and refill them if necessary. Check the oil level and air filter. Change the oil if it is has not been changed in several months.
Why is my propane generator blowing a fuse?
If the generator is rated at 500 watts and the device is 1,000 watts, this could put an unnecessary load on the generator resulting in a short or blown fuse. If the fuse is blown then replace it.
How long does it take for Generac generator to shut down?
If I wait maybe 15 to 20 mins it starts right up and repeats the cycle and eventually shuts down again. Anyone ever run across a faulty safety thermal limit switch that’s opening although it shouldn’t at wrong temperature ???
Why does my generator run for a few seconds then stops?
Low Fuel – Sometimes a very minor problem like less fuel in the fuel tank can also cause your generator to run for a few seconds and then stop. The generator may have enough fuel to get started a couple of times or run without the loads but when you out the loads, it stops.
When does the generator shut down in hot weather?
It ONLY shuts down after 30 mins of AC use, when its real hot outside, NEVER any other time and AC works fine plugged to shore power…….I have all other 120 VAC loads like fridge and charger etc OFF when I run the AC in extreme hot weather. If I wait maybe 15 to 20 mins it starts right up and repeats the cycle and eventually shuts down again.
What to do if your Onan generator starts then shuts down?
If there is no AC, proceed to check the field flash voltage through the field flash pin of the board. In the case field flash voltage is not present, the control board may be defective. If that happens to be the case, the “Onan generator starts then shuts down” issue could be taken care of by replacing the unit control board.