Glad I bought the ole extended warranty
2014 Fuzion 401 here, was out in the yard running the generator with both AC'S running...here in central Florida it's still in the 80's and humid out. Anyways about 45 minutes in the rear AC shut down...
Forum Discussion
I have an Onan 5500 in my 2014 Fuzion 331. I have two 30 amp breakers on my generator. The front A/C is on one and the back A/C and microwave are on the other. The other electrical items are pretty much split up between the two breakers. We tailgate at college football games in our toyhauler, so we are using our generator a lot in September and October.
We are normally very good about turning off the back A/C before we run the microwave. The first year we had the RV my wife ran the microwave and back A/C (and other small items that were plugged in) and it tripped the breaker on the generator. I heard what sounded like a surge before it tripped. Since then that same breaker has tripped very periodically with just the back A/C running. When it happens it is usually after the A/C has been running for a while.....I hear a small surge and then the breaker trips. It isn't consistent and I haven't been able to figure out why it trips.
I went through all kinds of tests to try to determine a pattern, but I haven't found one. I even took it to a Cummins location here in San Antonio to have the generator looked at. I took it to them in July. They ran both A/C's all day and never had an issue with the generator. They even plugged other things in and couldn't get it to trip. If they purposely overloaded the circuit then the breaker tripped as expected. Basically, they couldn't find anything wrong with it. I had them change the spark plugs because they were due, but that didn't change anything.
This past football season we had the same issue with the breaker tripping after the back A/C runs too long. I do plug other things like an LED tv and a satellite receiver in, but those shouldn't draw enough to cause it to trip. I'm going to try to do some more testing in May/June when it gets hotter. Who knows what, if anything, I'll find.
BTW, the Onan generator has a manufacturer's 3-yr warranty. I would get it serviced under that manufacturer's warranty before trying to use the extended warranty. The manufacturer's warranty is "bumper to bumper". If anything is broken, they will fix it for free. You may have to take it to a Cummins service center to get warranty work done.
We are normally very good about turning off the back A/C before we run the microwave. The first year we had the RV my wife ran the microwave and back A/C (and other small items that were plugged in) and it tripped the breaker on the generator. I heard what sounded like a surge before it tripped. Since then that same breaker has tripped very periodically with just the back A/C running. When it happens it is usually after the A/C has been running for a while.....I hear a small surge and then the breaker trips. It isn't consistent and I haven't been able to figure out why it trips.
I went through all kinds of tests to try to determine a pattern, but I haven't found one. I even took it to a Cummins location here in San Antonio to have the generator looked at. I took it to them in July. They ran both A/C's all day and never had an issue with the generator. They even plugged other things in and couldn't get it to trip. If they purposely overloaded the circuit then the breaker tripped as expected. Basically, they couldn't find anything wrong with it. I had them change the spark plugs because they were due, but that didn't change anything.
This past football season we had the same issue with the breaker tripping after the back A/C runs too long. I do plug other things like an LED tv and a satellite receiver in, but those shouldn't draw enough to cause it to trip. I'm going to try to do some more testing in May/June when it gets hotter. Who knows what, if anything, I'll find.
BTW, the Onan generator has a manufacturer's 3-yr warranty. I would get it serviced under that manufacturer's warranty before trying to use the extended warranty. The manufacturer's warranty is "bumper to bumper". If anything is broken, they will fix it for free. You may have to take it to a Cummins service center to get warranty work done.
