Push the STOP button momentarily and you should get another set of blinks. They will be double digit so count a couple of times. Post the complete model and serial of your ONAN5500 so the ONAN techs on this forum have something to work with to help you.
Generator Jim
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Having RV issues? Connect with others who have been in your shoes.24,203 PostsLatest Activity: Feb 21, 2025