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I think Bud is on the right track here. I have a suggestion but first a question. Does the engine continue to run after the overload light comes on or does it shutdown? If it continues to run, that pretty much eliminates the Low Oil Alert system because as the excerpt from the manual above says, the Alert system stops the engine if it detects low oil level. This would then leave the engine out of the problem and point toward an electronic problem. Bud is right that a flaky solder connection could open up in very cold weather and remake after it is warmed up. Also, you could have a component on the circuit which has gone temperature sensitive. Since you said above you wrapped the board in a towel, you have access to it. Get a hand-held hair dryer and put a nozzle on it to get the smallest stream of hot air you can find. With the generator good and cold, start it make sure the overload light comes on. Stop the engine and direct the stream of hot air on the board until it is nice and warm. Turn off the dryer and quickly (you don't want the board to cool off) start the generator and see if it works correctly. If it does, see if you can get a new inverter board. Trouble shooting something like this to the component or solder joint level isn't all that much fun.
Sorry this got so long but I wanted to try to explain throughly how you can test this yourself. It will take less time to do it than it takes to read about it. Best of luck and I really hope you can get this fixed.
Ken
Sorry this got so long but I wanted to try to explain throughly how you can test this yourself. It will take less time to do it than it takes to read about it. Best of luck and I really hope you can get this fixed.
Ken
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